A Medley of Potpourri

The Maurya Empire was a geographically-extensive Iron Age historical power based in Magadha and founded by Chandragupta Maurya which dominated the Indian subcontinent between 322 and 187 BCE. Comprising the majority of South Asia, the Maurya Empire was centralized by the conquest of the Indo-Gangetic Plain, and its capital city was located at Pataliputra (modern Patna). The empire was the largest political entity to have existed in the Indian subcontinent, spanning over 5 million square kilometres (1.9 million square miles) at its zenith under Ashoka.

Chandragupta Maurya raised an army, with the assistance of Chanakya (also known as Kauṭilya), and overthrew the Nanda Empire in c. 322 BCE. Chandragupta rapidly expanded his power westwards across central and western India by conquering the satraps left by Alexander the Great, and by 317 BCE the empire had fully occupied northwestern India. The Mauryan Empire then defeated Seleucus I, a diadochus and founder of the Seleucid Empire during the Seleucid–Mauryan war, thus acquiring territory west of the Indus River.

At its greatest extent, the empire stretched along the natural boundary of the Himalayas, to the east into Assam, to the west into Balochistan (southwest Pakistan and southeast Iran) and the Hindu Kush mountains of what is now eastern Afghanistan. The dynasty expanded into India's southern regions by the reign of the emperors Pushkar and Bindusara, but it excluded Kalinga (modern Odisha), until it was conquered by Ashoka. It declined for about 50 years after Ashoka's rule, and dissolved in 185 BCE with the foundation of the Shunga dynasty in Magadha.

Under Chandragupta Maurya and his successors, internal and external trade, agriculture, and economic activities all thrived and expanded across South Asia due to the creation of a single and efficient system of finance, administration, and security. The Maurya dynasty built the Grand Trunk Road, one of Asia's oldest and longest trade networks, connecting the Indian subcontinent with Central Asia. After the Kalinga War, the Empire experienced nearly half a century of centralized rule under Ashoka. Chandragupta Maurya's embrace of Jainism increased socio-religious reform across South Asia, while Ashoka's embrace of Buddhism and sponsorship of Buddhist missionaries allowed for the expansion of that faith into Sri Lanka, northwest India, Central Asia, Southeast Asia, Egypt, and Hellenistic Europe.

The population of the empire has been estimated to be about 50–60 million, making the Mauryan Empire one of the most populous empires of antiquity. Archaeologically, the period of Mauryan rule in South Asia falls into the era of Northern Black Polished Ware (NBPW). The Arthashastra and the Edicts of Ashoka are the primary sources of written records of Mauryan times. The Lion Capital of Ashoka at Sarnath is the national emblem of the modern Republic of India.

Etymology

The name "Maurya" does not occur in Ashoka's inscriptions, or the contemporary Greek accounts such as Megasthenes's Indica, but it is attested by the following sources:

The Junagadh rock inscription of Rudradaman (c. 150 CE) prefixes "Maurya" to the names Chandragupta and Ashoka.
The Puranas (c. 4th century CE or earlier) use Maurya as a dynastic appellation.
The Buddhist texts state that Chandragupta belonged to the "Moriya" clan of the Shakyas, the tribe to which Gautama Buddha belonged.
The Jain texts state that Chandragupta was the son of a royal superintendent of peacocks (mayura-poshaka).

According to the Buddhist tradition, the ancestors of the Maurya kings had settled in a region where peacocks (mora in Pali) were abundant. Therefore, they came to be known as "Moriyas", literally, "belonging to the place of peacocks". According to another Buddhist account, these ancestors built a city called Moriya-nagara ("Moriya-city"), which was so called, because it was built with the "bricks coloured like peacocks' necks".

The dynasty's connection to the peacocks, as mentioned in the Buddhist and Jain traditions, seems to be corroborated by archaeological evidence. For example, peacock figures are found on the Ashoka pillar at Nandangarh and several sculptures on the Great Stupa of Sanchi. Based on this eviedence, modern scholars theorize that the peacock may have been the dynasty's emblem.

Some later authors, such as Dhundiraja (a commentator on the Mudrarakshasa) and an annotator of the Vishnu Purana,state that the word "Maurya" is derived from Mura, the name of the wife of a Nanda king and the mother (or grandmother) of the first Maurya king. However, the Puranas themselves make no mention of Mura and do not talk of any relation between the Nanda and the Maurya dynasties. Dhundiraja's derivation of the word seems to be his own invention: according to the Sanskrit rules, the derivative of the feminine name Mura (IAST: Murā) would be "Maureya"; the term "Maurya" can only be derived from the masculine "Mura".

History

The Maurya dynasty ruled for 137 years.

Chandragupta Maurya and Chanakya

The Maurya Empire was founded by Chandragupta Maurya, with help from Chanakya, at Takshashila, a noted center of learning. According to several legends, Chanakya travelled to Magadha, a kingdom that was large and militarily powerful and feared by its neighbours, but was insulted by its king Dhana Nanda, of the Nanda dynasty. Chanakya swore revenge and vowed to destroy the Nanda Empire. Meanwhile, the conquering armies of Alexander the Great refused to cross the Beas River and advance further eastward, deterred by the prospect of battling Magadha. Alexander returned to Babylon and re-deployed most of his troops west of the Indus River. Soon after Alexander died in Babylon in 323 BCE, his empire fragmented into independent kingdoms led by his generals.

The Greek generals Eudemus and Peithon ruled in the Indus Valley until around 317 BCE, when Chandragupta Maurya (with the help of Chanakya, who was now his advisor) orchestrated a rebellion to drive out the Greek governors, and subsequently brought the Indus Valley under the control of his new seat of power in Magadha.

Chandragupta Maurya's rise to power is shrouded in mystery and controversy. On one hand, a number of ancient Indian accounts, such as the drama Mudrarakshasa (Signet ring of Rakshasa – Rakshasa was the prime minister of Magadha) by Vishakhadatta, describe his royal ancestry and even link him with the Nanda family. A kshatriya clan known as the Maurya's are referred to in the earliest Buddhist texts, Mahaparinibbana Sutta. However, any conclusions are hard to make without further historical evidence. Chandragupta first emerges in Greek accounts as "Sandrokottos". As a young man he is said to have met Alexander. He is also said to have met the Nanda king, angered him, and made a narrow escape. Chanakya's original intentions were to train army under Chandragupta's command.

Conquest of Magadha

Chanakya encouraged Chandragupta Maurya and his army to take over the throne of Magadha. Using his intelligence network, Chandragupta gathered many young men from across Magadha and other provinces, men upset over the corrupt and oppressive rule of king Dhana Nanda, plus the resources necessary for his army to fight a long series of battles. These men included the former general of Taxila, accomplished students of Chanakya, the representative of King Parvataka, his son Malayaketu, and the rulers of small states. The Macedonians (described as Yona or Yavana in Indian sources) may then have participated, together with other groups, in the armed uprising of Chandragupta Maurya against the Nanda dynasty. The Mudrarakshasa of Visakhadutta as well as the Jaina work Parisishtaparvan talk of Chandragupta's alliance with the Himalayan king Parvataka, often identified with Porus, although this identification is not accepted by all historians. This Himalayan alliance gave Chandragupta a composite and powerful army made up of Yavanas (Greeks), Kambojas, Shakas (Scythians), Kiratas (Himalayans), Parasikas (Persians) and Bahlikas (Bactrians) who took Pataliputra (also called Kusumapura, "The City of Flowers"):

"Kusumapura was besieged from every direction by the forces of Parvata and Chandragupta: Shakas, Yavanas, Kiratas, Kambojas, Parasikas, Bahlikas and others, assembled on the advice of Chanakya" in Mudrarakshasa 2

Preparing to invade Pataliputra, Maurya came up with a strategy. A battle was announced and the Magadhan army was drawn from the city to a distant battlefield to engage with Maurya's forces. Maurya's general and spies meanwhile bribed the corrupt general of Nanda. He also managed to create an atmosphere of civil war in the kingdom, which culminated in the death of the heir to the throne. Chanakya managed to win over popular sentiment. Ultimately Nanda resigned, handing power to Chandragupta, and went into exile and was never heard of again. Chanakya contacted the prime minister, Rakshasas, and made him understand that his loyalty was to Magadha, not to the Nanda dynasty, insisting that he continue in office. Chanakya also reiterated that choosing to resist would start a war that would severely affect Magadha and destroy the city. Rakshasa accepted Chanakya's reasoning, and Chandragupta Maurya was legitimately installed as the new King of Magadha. Rakshasa became Chandragupta's chief advisor, and Chanakya assumed the position of an elder statesman.

Chandragupta Maurya

Pataliputra, capital of the Mauryas. Ruins of pillared hall at Kumrahar site.

The Pataliputra capital, discovered at the Bulandi Bagh site of Pataliputra, 4th-3rd c. BCE.

In 305 BCE, Chandragupta led a series of campaigns to retake the satrapies left behind by Alexander the Great when he returned westwards, while Seleucus I Nicator fought to defend these territories. The two rulers concluded a peace treaty in 303 BCE, including a marital alliance. Chandragupta snatched the satrapies of Paropamisade (Kamboja and Gandhara), Arachosia (Kandhahar) and Gedrosia (Balochistan), and Seleucus I Nicator received 500 war elephants that were to have a decisive role in his victory against western Hellenistic kings at the Battle of Ipsus in 301 BCE. Diplomatic relations were established and several Greeks, such as the historian Megasthenes, Deimakos and Dionysius resided at the Mauryan court. Megasthenes in particular was a notable Greek ambassador in the court of Chandragupta Maurya. According to Arrian, ambassador Megasthenes (c.350–c.290 BCE) lived in Arachosia and travelled to Pataliputra.

Chandragupta established a strong centralized state with an administration at Pataliputra, which, according to Megasthenes, was "surrounded by a wooden wall pierced by 64 gates and 570 towers". Aelian, although not expressly quoting Megasthenes nor mentionning Pataliputra, described Indian palaces as superior in splendor to Persia's Susa or Ectabana. The architecture of the city seems to have had many similarities with Persian cities of the period.

Chandragupta's son Bindusara extended the rule of the Mauryan empire towards southern India. The famous Tamil poet Mamulanar of the Sangam literature described how the Deccan Plateau was invaded by the Maurya army. He also had a Greek ambassador at his court, named Megasthenes.

Megasthenes describes a disciplined multitude under Chandragupta, who live simply, honestly, and do not know writing:

The Indians all live frugally, especially when in camp. They dislike a great undisciplined multitude, and consequently they observe good order. Theft is of very rare occurrence. Megasthenes says that those who were in the camp of Sandrakottos, wherein lay 400,000 men, found that the thefts reported on any one day did not exceed the value of two hundred drachmae, and this among a people who have no written laws, but are ignorant of writing, and must therefore in all the business of life trust to memory. They live, nevertheless, happily enough, being simple in their manners and frugal. They never drink wine except at sacrifices. Their beverage is a liquor composed from rice instead of barley, and their food is principally a rice-pottage.

— Strabo XV. i. 53–56, quoting Megasthenes.

Chandragupta renounced his throne and followed Jain teacher Bhadrabahu. He is said to have lived as an ascetic at Shravanabelagola for several years before fasting to death, as per the Jain practice of sallekhana.

Bindusara

A silver coin of 1 karshapana of the Maurya empire, period of Bindusara Maurya about 297-272 BC, workshop of Pataliputra. Obv: Symbols with a Sun Rev: Symbol Dimensions: 14 x 11 mm Weight: 3.4 g.

Bindusara was born to Chandragupta, the founder of the Mauryan Empire. This is attested by several sources, including the various Puranas and the Mahavamsa. He is attested by the Buddhist texts such as Dipavamsa and Mahavamsa ("Bindusaro"); the Jain texts such as Parishishta-Parvan; as well as the Hindu texts such as Vishnu Purana ("Vindusara"). According to the 12th century Jain writer Hemachandra's Parishishta-Parvan, the name of Bindusara's mother was Durdhara. Some Greek sources also mention him by the name "Amitrochates" or its variations.

Historian Upinder Singh estimates that Bindusara ascended the throne around 297 BCE. Bindusara, just 22 years old, inherited a large empire that consisted of what is now, Northern, Central and Eastern parts of India along with parts of Afghanistan and Baluchistan. Bindusara extended this empire to the southern part of India, as far as what is now known as Karnataka. He brought sixteen states under the Mauryan Empire and thus conquered almost all of the Indian peninsula (he is said to have conquered the 'land between the two seas' – the peninsular region between the Bay of Bengal and the Arabian Sea). Bindusara didn't conquer the friendly Tamil kingdoms of the Cholas, ruled by King Ilamcetcenni, the Pandyas, and Cheras. Apart from these southern states, Kalinga (modern Odisha) was the only kingdom in India that didn't form the part of Bindusara's empire. It was later conquered by his son Ashoka, who served as the viceroy of Ujjaini during his father's reign, which highlights the importance of the town.

Bindusara's life has not been documented as well as that of his father Chandragupta or of his son Ashoka. Chanakya continued to serve as prime minister during his reign. According to the medieval Tibetan scholar Taranatha who visited India, Chanakya helped Bindusara "to destroy the nobles and kings of the sixteen kingdoms and thus to become absolute master of the territory between the eastern and western oceans." During his rule, the citizens of Taxila revolted twice. The reason for the first revolt was the maladministration of Susima, his eldest son. The reason for the second revolt is unknown, but Bindusara could not suppress it in his lifetime. It was crushed by Ashoka after Bindusara's death.

Bindusara maintained friendly diplomatic relations with the Hellenic World. Deimachus was the ambassador of Seleucid emperor Antiochus I at Bindusara's court. Diodorus states that the king of Palibothra (Pataliputra, the Mauryan capital) welcomed a Greek author, Iambulus. This king is usually identified as Bindusara. Pliny states that the Egyptian king Philadelphus sent an envoy named Dionysius to India. According to Sailendra Nath Sen, this appears to have happened during Bindusara's reign.

Unlike his father Chandragupta (who at a later stage converted to Jainism), Bindusara believed in the Ajivika sect. Bindusara's guru Pingalavatsa (Janasana) was a Brahmin of the Ajivika sect. Bindusara's wife, Queen Subhadrangi (Queen Aggamahesi) was a Brahmin also of the Ajivika sect from Champa (present Bhagalpur district). Bindusara is credited with giving several grants to Brahmin monasteries (Brahmana-bhatto).

Historical evidence suggests that Bindusara died in the 270s BCE. According to Upinder Singh, Bindusara died around 273 BCE. Alain Daniélou believes that he died around 274 BCE. Sailendra Nath Sen believes that he died around 273-272 BCE, and that his death was followed by a four-year struggle of succession, after which his son Ashoka became the emperor in 269-268 BCE. According to the Mahavamsa, Bindusara reigned for 28 years. The Vayu Purana, which names Chandragupta's successor as "Bhadrasara", states that he ruled for 25 years.

Ashoka

Aśoka pillar at Sarnath. ca. 250 BCE.

Ashoka pillar at Vaishali.

Fragment of the 6th Pillar Edict of Ashoka (238 BCE), in Brahmi, sandstone, British Museum.

As a young prince, Ashoka (r. 272–232 BCE) was a brilliant commander who crushed revolts in Ujjain and Takshashila. As monarch he was ambitious and aggressive, re-asserting the Empire's superiority in southern and western India. But it was his conquest of Kalinga (262–261 BCE) which proved to be the pivotal event of his life. Ashoka used Kalinga to project power over a large region by building a fortification there and securing it as a possession. Although Ashoka's army succeeded in overwhelming Kalinga forces of royal soldiers and civilian units, an estimated 100,000 soldiers and civilians were killed in the furious warfare, including over 10,000 of Ashoka's own men. Hundreds of thousands of people were adversely affected by the destruction and fallout of war. When he personally witnessed the devastation, Ashoka began feeling remorse. Although the annexation of Kalinga was completed, Ashoka embraced the teachings of Buddhism, and renounced war and violence. He sent out missionaries to travel around Asia and spread Buddhism to other countries.

Ashoka implemented principles of ahimsa by banning hunting and violent sports activity and ending indentured and forced labor (many thousands of people in war-ravaged Kalinga had been forced into hard labour and servitude). While he maintained a large and powerful army, to keep the peace and maintain authority, Ashoka expanded friendly relations with states across Asia and Europe, and he sponsored Buddhist missions. He undertook a massive public works building campaign across the country. Over 40 years of peace, harmony and prosperity made Ashoka one of the most successful and famous monarchs in Indian history. He remains an idealized figure of inspiration in modern India.

The Edicts of Ashoka, set in stone, are found throughout the Subcontinent. Ranging from as far west as Afghanistan and as far south as Andhra (Nellore District), Ashoka's edicts state his policies and accomplishments. Although predominantly written in Prakrit, two of them were written in Greek, and one in both Greek and Aramaic. Ashoka's edicts refer to the Greeks, Kambojas, and Gandharas as peoples forming a frontier region of his empire. They also attest to Ashoka's having sent envoys to the Greek rulers in the West as far as the Mediterranean. The edicts precisely name each of the rulers of the Hellenic world at the time such as Amtiyoko (Antiochus), Tulamaya (Ptolemy), Amtikini (Antigonos), Maka (Magas) and Alikasudaro (Alexander) as recipients of Ashoka's proselytism. The Edicts also accurately locate their territory "600 yojanas away" (a yojanas being about 7 miles), corresponding to the distance between the center of India and Greece (roughly 4,000 miles).

Decline

Ashoka was followed for 50 years by a succession of weaker kings. Brihadratha, the last ruler of the Mauryan dynasty, held territories that had shrunk considerably from the time of emperor Ashoka. Brihadratha was assassinated in 185 BCE during a military parade by the Brahmin general Pushyamitra Shunga, commander-in-chief of his guard, who then took over the throne and established the Shunga dynasty.

Shunga coup (185 BCE)

Buddhist records such as the Ashokavadana write that the assassination of Brihadratha and the rise of the Shunga empire led to a wave of religious persecution for Buddhists, and a resurgence of Hinduism. According to Sir John Marshall, Pushyamitra may have been the main author of the persecutions, although later Shunga kings seem to have been more supportive of Buddhism. Other historians, such as Etienne Lamotte and Romila Thapar, among others, have argued that archaeological evidence in favour of the allegations of persecution of Buddhists are lacking, and that the extent and magnitude of the atrocities have been exaggerated.

Establishment of the Indo-Greek Kingdom (180 BCE)

The fall of the Mauryas left the Khyber Pass unguarded, and a wave of foreign invasion followed. The Greco-Bactrian king, Demetrius, capitalized on the break-up, and he conquered southern Afghanistan and parts of northwestern India around 180 BCE, forming the Indo-Greek Kingdom. The Indo-Greeks would maintain holdings on the trans-Indus region, and make forays into central India, for about a century. Under them, Buddhism flourished, and one of their kings, Menander, became a famous figure of Buddhism; he was to establish a new capital of Sagala, the modern city of Sialkot. However, the extent of their domains and the lengths of their rule are subject to much debate. Numismatic evidence indicates that they retained holdings in the subcontinent right up to the birth of Christ. Although the extent of their successes against indigenous powers such as the Shungas, Satavahanas, and Kalingas are unclear, what is clear is that Scythian tribes, renamed Indo-Scythians, brought about the demise of the Indo-Greeks from around 70 BCE and retained lands in the trans-Indus, the region of Mathura, and Gujarat.

Administration

Statuettes of the Mauryan era

The Empire was divided into four provinces, with the imperial capital at Pataliputra. From Ashokan edicts, the names of the four provincial capitals are Tosali (in the east), Ujjain (in the west), Suvarnagiri (in the south), and Taxila (in the north). The head of the provincial administration was the Kumara (royal prince), who governed the provinces as king's representative. The kumara was assisted by Mahamatyas and council of ministers. This organizational structure was reflected at the imperial level with the Emperor and his Mantriparishad (Council of Ministers).

Historians theorise that the organisation of the Empire was in line with the extensive bureaucracy described by Kautilya in the Arthashastra: a sophisticated civil service governed everything from municipal hygiene to international trade. The expansion and defense of the empire was made possible by what appears to have been one of the largest armies in the world during the Iron Age. According to Megasthenes, the empire wielded a military of 600,000 infantry, 30,000 cavalry, 8,000 chariots and 9,000 war elephants besides followers and attendants. A vast espionage system collected intelligence for both internal and external security purposes. Having renounced offensive warfare and expansionism, Ashoka nevertheless continued to maintain this large army, to protect the Empire and instil stability and peace across West and South Asia.

Economy

Maurya statuette, 2nd century BCE.

For the first time in South Asia, political unity and military security allowed for a common economic system and enhanced trade and commerce, with increased agricultural productivity. The previous situation involving hundreds of kingdoms, many small armies, powerful regional chieftains, and internecine warfare, gave way to a disciplined central authority. Farmers were freed of tax and crop collection burdens from regional kings, paying instead to a nationally administered and strict-but-fair system of taxation as advised by the principles in the Arthashastra. Chandragupta Maurya established a single currency across India, and a network of regional governors and administrators and a civil service provided justice and security for merchants, farmers and traders. The Mauryan army wiped out many gangs of bandits, regional private armies, and powerful chieftains who sought to impose their own supremacy in small areas. Although regimental in revenue collection, Maurya also sponsored many public works and waterways to enhance productivity, while internal trade in India expanded greatly due to new-found political unity and internal peace.

Under the Indo-Greek friendship treaty, and during Ashoka's reign, an international network of trade expanded. The Khyber Pass, on the modern boundary of Pakistan and Afghanistan, became a strategically important port of trade and intercourse with the outside world. Greek states and Hellenic kingdoms in West Asia became important trade partners of India. Trade also extended through the Malay peninsula into Southeast Asia. India's exports included silk goods and textiles, spices and exotic foods. The external world came across new scientific knowledge and technology with expanding trade with the Mauryan Empire. Ashoka also sponsored the construction of thousands of roads, waterways, canals, hospitals, rest-houses and other public works. The easing of many over-rigorous administrative practices, including those regarding taxation and crop collection, helped increase productivity and economic activity across the Empire.

In many ways, the economic situation in the Mauryan Empire is analogous to the Roman Empire of several centuries later. Both had extensive trade connections and both had organizations similar to corporations. While Rome had organizational entities which were largely used for public state-driven projects, Mauryan India had numerous private commercial entities. These existed purely for private commerce and developed before the Mauryan Empire itself.

Religion

Jainism

Bhadrabahu Cave, Shravanabelagola where Chandragupta is said to have died

Chandragupta Maurya embraced Jainism after retiring, when he renounced his throne and material possessions to join a wandering group of Jain monks. Chandragupta was a disciple of the Jain monk Acharya Bhadrabahu. It is said that in his last days, he observed the rigorous but self-purifying Jain ritual of santhara (fast unto death), at Shravana Belgola in Karnataka. Samprati, the grandson of Ashoka, also patronized Jainism. Samprati was influenced by the teachings of Jain monks like Suhastin and he is said to have built 125,000 derasars across India. Some of them are still found in the towns of Ahmedabad, Viramgam, Ujjain, and Palitana. It is also said that just like Ashoka, Samprati sent messengers and preachers to Greece, Persia and the Middle East for the spread of Jainism, but, to date, no research has been done in this area.

Thus, Jainism became a vital force under the Mauryan Rule. Chandragupta and Samprati are credited for the spread of Jainism in South India. Hundreds of thousands of temples and stupas are said to have been erected during their reigns.

Buddhism

The stupa, which contained the relics of Buddha, at the center of the Sanchi complex was originally built by the Maurya Empire, but the balustrade around it is Sunga, and the decorative gateways are from the later Satavahana period.

The Dharmarajika stupa in Taxila, modern Pakistan, is also thought to have been established by Emperor Asoka.

Magadha, the centre of the empire, was also the birthplace of Buddhism. Ashoka initially practised Hinduism but later embraced Buddhism; following the Kalinga War, he renounced expansionism and aggression, and the harsher injunctions of the Arthashastra on the use of force, intensive policing, and ruthless measures for tax collection and against rebels. Ashoka sent a mission led by his son Mahinda and daughter Sanghamitta to Sri Lanka, whose king Tissa was so charmed with Buddhist ideals that he adopted them himself and made Buddhism the state religion. Ashoka sent many Buddhist missions to West Asia, Greece and South East Asia, and commissioned the construction of monasteries and schools, as well as the publication of Buddhist literature across the empire. He is believed to have built as many as 84,000 stupas across India, such as Sanchi and Mahabodhi Temple, and he increased the popularity of Buddhism in Afghanistan, Thailand and North Asia including Siberia. Ashoka helped convene the Third Buddhist Council of India's and South Asia's Buddhist orders near his capital, a council that undertook much work of reform and expansion of the Buddhist religion. Indian merchants embraced Buddhism and played a large role in spreading the religion across the Mauryan Empire.

Architectural remains

Mauryan architecture in the Barabar Caves. Lomas Rishi Cave. 3rd century BCE.

The greatest monument of this period, executed in the reign of Chandragupta Maurya, was the old palace at the site of Kumhrar. Excavations at the site of Kumhrar nearby have unearthed the remains of the palace. The palace is thought to have been an aggregate of buildings, the most important of which was an immense pillared hall supported on a high substratum of timbers. The pillars were set in regular rows, thus dividing the hall into a number of smaller square bays. The number of columns is 80, each about 7 meters high. According to the eyewitness account of Megasthenes, the palace was chiefly constructed of timber, and was considered to exceed in splendour and magnificence the palaces of Susa and Ecbatana, its gilded pillars being adorned with golden vines and silver birds. The buildings stood in an extensive park studded with fish ponds and furnished with a great variety of ornamental trees and shrubs. Kauṭilya's Arthashastra also gives the method of palace construction from this period. Later fragments of stone pillars, including one nearly complete, with their round tapering shafts and smooth polish, indicate that Ashoka was responsible for the construction of the stone columns which replaced the earlier wooden ones.

An early stupa, 6 meters in diameter, with fallen umbrella on side. Chakpat, near Chakdara. Probably Maurya, 3rd century BCE.

During the Ashokan period, stonework was of a highly diversified order and comprised lofty free-standing pillars, railings of stupas, lion thrones and other colossal figures. The use of stone had reached such great perfection during this time that even small fragments of stone art were given a high lustrous polish resembling fine enamel. This period marked the beginning of the Buddhist school of architecture. Ashoka was responsible for the construction of several stupas, which were large domes and bearing symbols of Buddha. The most important ones are located at Sanchi, Bharhut, Amaravati, Bodhgaya and Nagarjunakonda. The most widespread examples of Mauryan architecture are the Ashoka pillars and carved edicts of Ashoka, often exquisitely decorated, with more than 40 spread throughout the Indian subcontinent.

The peacock was a dynastic symbol of Mauryans, as depicted by Ashoka's pillars at Nandangarh and Sanchi Stupa.

Natural history

The two Yakshas, possibly 3rd century BCE, found in Pataliputra.

The protection of animals in India became serious business by the time of the Maurya dynasty; being the first empire to provide a unified political entity in India, the attitude of the Mauryas towards forests, their denizens, and fauna in general is of interest.

The Mauryas firstly looked at forests as resources. For them, the most important forest product was the elephant. Military might in those times depended not only upon horses and men but also battle-elephants; these played a role in the defeat of Seleucus, one of Alexander's former generals. The Mauryas sought to preserve supplies of elephants since it was cheaper and took less time to catch, tame and train wild elephants than to raise them. Kautilya's Arthashastra contains not only maxims on ancient statecraft, but also unambiguously specifies the responsibilities of officials such as the Protector of the Elephant Forests.

On the border of the forest, he should establish a forest for elephants guarded by foresters. The Office of the Chief Elephant Forester should with the help of guards protect the elephants in any terrain. The slaying of an elephant is punishable by death.

— Arthashastra

The Mauryas also designated separate forests to protect supplies of timber, as well as lions and tigers for skins. Elsewhere the Protector of Animals also worked to eliminate thieves, tigers and other predators to render the woods safe for grazing cattle.

The Mauryas valued certain forest tracts in strategic or economic terms and instituted curbs and control measures over them. They regarded all forest tribes with distrust and controlled them with bribery and political subjugation. They employed some of them, the food-gatherers or aranyaca to guard borders and trap animals. The sometimes tense and conflict-ridden relationship nevertheless enabled the Mauryas to guard their vast empire.

When Ashoka embraced Buddhism in the latter part of his reign, he brought about significant changes in his style of governance, which included providing protection to fauna, and even relinquished the royal hunt. He was the first ruler in history to advocate conservation measures for wildlife and even had rules inscribed in stone edicts. The edicts proclaim that many followed the king's example in giving up the slaughter of animals; one of them proudly states:

Our king killed very few animals.

— Edict on Fifth Pillar

However, the edicts of Ashoka reflect more the desire of rulers than actual events; the mention of a 100 'panas' (coins) fine for poaching deer in royal hunting preserves shows that rule-breakers did exist. The legal restrictions conflicted with the practices freely exercised by the common people in hunting, felling, fishing and setting fires in forests.

Contacts with the Hellenistic world

Mauryan ringstone, with standing goddess. Northwest Pakistan. 3rd Century BCE

Foundation of the Empire

Relations with the Hellenistic world may have started from the very beginning of the Maurya Empire. Plutarch reports that Chandragupta Maurya met with Alexander the Great, probably around Taxila in the northwest:

"Sandrocottus, when he was a stripling, saw Alexander himself, and we are told that he often said in later times that Alexander narrowly missed making himself master of the country, since its king was hated and despised on account of his baseness and low birth". Plutarch 62-4

Reconquest of the Northwest (c. 317–316 BCE)

Chandragupta ultimately occupied Northwestern India, in the territories formerly ruled by the Greeks, where he fought the satraps (described as "Prefects" in Western sources) left in place after Alexander (Justin), among whom may have been Eudemus, ruler in the western Punjab until his departure in 317 BCE or Peithon, son of Agenor, ruler of the Greek colonies along the Indus until his departure for Babylon in 316 BCE.

"India, after the death of Alexander, had assassinated his prefects, as if shaking the burden of servitude. The author of this liberation was Sandracottos, but he had transformed liberation in servitude after victory, since, after taking the throne, he himself oppressed the very people he has liberated from foreign domination" Justin XV.4.12–13

"Later, as he was preparing war against the prefects of Alexander, a huge wild elephant went to him and took him on his back as if tame, and he became a remarkable fighter and war leader. Having thus acquired royal power, Sandracottos possessed India at the time Seleucos was preparing future glory." Justin XV.4.19

Conflict and alliance with Seleucus (305 BCE)

A map showing the north western border of Maurya Empire, including its various neighboring states.

Seleucus I Nicator, the Macedonian satrap of the Asian portion of Alexander's former empire, conquered and put under his own authority eastern territories as far as Bactria and the Indus (Appian, History of Rome, The Syrian Wars 55), until in 305 BCE he entered into a confrontation with Emperor Chandragupta:

"Always lying in wait for the neighbouring nations, strong in arms and persuasive in council, he [Seleucus] acquired Mesopotamia, Armenia, 'Seleucid' Cappadocia, Persis, Parthia, Bactria, Arabia, Tapouria, Sogdia, Arachosia, Hyrcania, and other adjacent peoples that had been subdued by Alexander, as far as the river Indus, so that the boundaries of his empire were the most extensive in Asia after that of Alexander. The whole region from Phrygia to the Indus was subject to Seleucus". Appian, History of Rome, The Syrian Wars 55

Though no accounts of the conflict remain, it is clear that Seleucus fared poorly against the Indian Emperor as he failed to conquer any territory, and in fact was forced to surrender much that was already his. Regardless, Seleucus and Chandragupta ultimately reached a settlement and through a treaty sealed in 305 BCE, Seleucus, according to Strabo, ceded a number of territories to Chandragupta, including eastern Afghanistan and Balochistan.

Marital alliance

Chandragupta and Seleucus concluded a peace treaty and a marital alliance in 303 BCE. Chandragupta received vast territories and in a return gave Seleucus 500 war elephants, a military asset which would play a decisive role at the Battle of Ipsus in 301 BCE. In addition to this treaty, Seleucus dispatched an ambassador, Megasthenes, to Chandragupta, and later Deimakos to his son Bindusara, at the Mauryan court at Pataliputra (modern Patna in Bihar). Later, Ptolemy II Philadelphus, the ruler of Ptolemaic Egypt and contemporary of Ashoka, is also recorded by Pliny the Elder as having sent an ambassador named Dionysius to the Mauryan court.

Mainstream scholarship asserts that Chandragupta received vast territory west of the Indus, including the Hindu Kush, modern-day Afghanistan, and the Balochistan province of Pakistan. Archaeologically, concrete indications of Mauryan rule, such as the inscriptions of the Edicts of Ashoka, are known as far as Kandahar in southern Afghanistan.

“

He (Seleucus) crossed the Indus and waged war with Sandrocottus [Maurya], king of the Indians, who dwelt on the banks of that stream, until they came to an understanding with each other and contracted a marriage relationship.

”

“

After having made a treaty with him (Sandrakotos) and put in order the Orient situation, Seleucos went to war against Antigonus.

”

— Junianus Justinus, Historiarum Philippicarum, libri XLIV, XV.4.15

The treaty on "Epigamia" implies lawful marriage between Greeks and Indians was recognized at the State level, although it is unclear whether it occurred among dynastic rulers or common people, or both.

Exchange of presents

Classical sources have also recorded that following their treaty, Chandragupta and Seleucus exchanged presents, such as when Chandragupta sent various aphrodisiacs to Seleucus:

"And Theophrastus says that some contrivances are of wondrous efficacy in such matters [as to make people more amorous]. And Phylarchus confirms him, by reference to some of the presents which Sandrakottus, the king of the Indians, sent to Seleucus; which were to act like charms in producing a wonderful degree of affection, while some, on the contrary, were to banish love." Athenaeus of Naucratis, "The deipnosophists" Book I, chapter 32

His son Bindusara 'Amitraghata' (Slayer of Enemies) also is recorded in Classical sources as having exchanged presents with Antiochus I:

"But dried figs were so very much sought after by all men (for really, as Aristophanes says, "There's really nothing nicer than dried figs"), that even Amitrochates, the king of the Indians, wrote to Antiochus, entreating him (it is Hegesander who tells this story) to buy and send him some sweet wine, and some dried figs, and a sophist; and that Antiochus wrote to him in answer, "The dry figs and the sweet wine we will send you; but it is not lawful for a sophist to be sold in Greece." Athenaeus, "Deipnosophistae" XIV.67

Greek population in India

An influential and large Greek population was present in the northwest of the Indian subcontinent under Ashoka's rule, possibly remnants of Alexander's conquests in the Indus Valley region. In the Rock Edicts of Ashoka, some of them inscribed in Greek, Ashoka states that the Greeks within his dominion were converted to Buddhism:

"Here in the king's dominion among the Greeks, the Kambojas, the Nabhakas, the Nabhapamkits, the Bhojas, the Pitinikas, the Andhras and the Palidas, everywhere people are following Beloved-of-the-Gods' instructions in Dharma." (Rock Edict Number 13)

An Edict of Ashoka in Shahbazbarhi, KPK, Pakistan.

"Now, in times past (officers) called Mahamatras of morality did not exist before. Mahdmatras of morality were appointed by me (when I had been) anointed thirteen years. These are occupied with all sects in establishing morality, in promoting morality, and for the welfare and happiness of those who are devoted to morality (even) among the Greeks, Kambojas and Gandharas, and whatever other western borderers (of mine there are)." (Rock Edict Number 5)

The Kandahar Edict of Ashoka, a bilingual edict (Greek and Aramaic) by king Ashoka, from Kandahar. Kabul Museum. (Click image for translation).

Fragments of Edict 13 have been found in Greek, and a full Edict, written in both Greek and Aramaic, has been discovered in Kandahar. It is said to be written in excellent Classical Greek, using sophisticated philosophical terms. In this Edict, Ashoka uses the word Eusebeia ("Piety") as the Greek translation for the ubiquitous "Dharma" of his other Edicts written in Prakrit:

"Ten years (of reign) having been completed, King Piodasses (Ashoka) made known (the doctrine of) Piety (εὐσέβεια, Eusebeia) to men; and from this moment he has made men more pious, and everything thrives throughout the whole world. And the king abstains from (killing) living beings, and other men and those who (are) huntsmen and fishermen of the king have desisted from hunting. And if some (were) intemperate, they have ceased from their intemperance as was in their power; and obedient to their father and mother and to the elders, in opposition to the past also in the future, by so acting on every occasion, they will live better and more happily". (Trans. by G.P. Carratelli)

Buddhist missions to the West (c. 250 BCE)

The distribution of the Edicts of Ashoka.
Map of the Buddhist missions during the reign of Ashoka.
Territories "conquered by the Dharma" according to Major Rock Edict No.13 of Ashoka (260–218 BCE).

Also, in the Edicts of Ashoka, Ashoka mentions the Hellenistic kings of the period as recipients of his Buddhist proselytism, although no Western historical record of this event remains:

"The conquest by Dharma has been won here, on the borders, and even six hundred yojanas (5,400–9,600 km) away, where the Greek king Antiochos rules, beyond there where the four kings named Ptolemy, Antigonos, Magas and Alexander rule, likewise in the south among the Cholas, the Pandyas, and as far as Tamraparni (Sri Lanka)." (Edicts of Ashoka, 13th Rock Edict, S. Dhammika).

Ashoka also encouraged the development of herbal medicine, for men and animals, in their territories:

"Everywhere within Beloved-of-the-Gods, King Piyadasi's [Ashoka's] domain, and among the people beyond the borders, the Cholas, the Pandyas, the Satiyaputras, the Keralaputras, as far as Tamraparni and where the Greek king Antiochos rules, and among the kings who are neighbors of Antiochos, everywhere has Beloved-of-the-Gods, King Piyadasi, made provision for two types of medical treatment: medical treatment for humans and medical treatment for animals. Wherever medical herbs suitable for humans or animals are not available, I have had them imported and grown. Wherever medical roots or fruits are not available I have had them imported and grown. Along roads I have had wells dug and trees planted for the benefit of humans and animals". 2nd Rock Edict

The Greeks in India even seem to have played an active role in the propagation of Buddhism, as some of the emissaries of Ashoka, such as Dharmaraksita, are described in Pali sources as leading Greek ("Yona") Buddhist monks, active in Buddhist proselytism (the Mahavamsa, XII).

Subhagasena and Antiochos III (206 BCE)

Sophagasenus was an Indian Mauryan ruler of the 3rd century BCE, described in ancient Greek sources, and named Subhagasena or Subhashasena in Prakrit. His name is mentioned in the list of Mauryan princes, and also in the list of the Yadava dynasty, as a descendant of Pradyumna. He may have been a grandson of Ashoka, or Kunala, the son of Ashoka. He ruled an area south of the Hindu Kush, possibly in Gandhara. Antiochos III, the Seleucid king, after having made peace with Euthydemus in Bactria, went to India in 206 BCE and is said to have renewed his friendship with the Indian king there:

"He (Antiochus) crossed the Caucasus and descended into India; renewed his friendship with Sophagasenus the king of the Indians; received more elephants, until he had a hundred and fifty altogether; and having once more provisioned his troops, set out again personally with his army: leaving Androsthenes of Cyzicus the duty of taking home the treasure which this king had agreed to hand over to him". Polybius 11.39

Timeline

322 BCE: Chandragupta Maurya founded the Mauryan Empire by overthrowing the Nanda Dynasty.
317–316 BCE: Chandragupta Maurya conquers the Northwest of the Indian subcontinent.
305–303 BCE: Chandragupta Maurya gains territory from the Seleucid Empire.
298–269 BCE: Reign of Bindusara, Chandragupta's son. He conquers parts of Deccan, southern India.
269–232 BCE: The Mauryan Empire reaches its height under Ashoka, Chandragupta's grandson.
261 BCE: Ashoka conquers the kingdom of Kalinga.
250 BCE: Ashoka builds Buddhist stupas and erects pillars bearing inscriptions.
184 BCE: The empire collapses when Brihadnatha, the last emperor, is killed by Pushyamitra Shunga, a Mauryan general and the founder of the Shunga Empire.

In literature

According to Vicarasreni of Merutunga, Mauryans rose to power in 312 BC.

Antoine Lavoisier

From Wikipedia, the free encyclopedia

Antoine-Laurent de Lavoisier
Portrait of Antoine-Laurent de Lavoisier and his wife, chemist Marie-Anne Pierrette Paulze by Jacques-Louis David
Born	26 August 1743 Paris, France
Died	8 May 1794 (aged 50) Paris, France
Cause of death	Execution by guillotine
Resting place	Catacombs of Paris
Alma mater	Collège des Quatre-Nations, University of Paris
Known for	Combustion Identified oxygen Identified hydrogen Stoichiometry
Scientific career
Fields	Biologist, chemist
Notable students	Éleuthère Irénée du Pont
Influences	Guillaume-François Rouelle, Étienne Condillac
Signature

Antoine-Laurent de Lavoisier (also Antoine Lavoisier after the French Revolution; French: [ɑ̃twan lɔʁɑ̃ də lavwazje]; 26 August 1743 – 8 May 1794) was a French nobleman and chemist who was central to the 18th-century chemical revolution and who had a large influence on both the history of chemistry and the history of biology. He is widely considered in popular literature as the "father of modern chemistry".

It is generally accepted that Lavoisier's great accomplishments in chemistry stem largely from his changing the science from a qualitative to a quantitative one. Lavoisier is most noted for his discovery of the role oxygen plays in combustion. He recognized and named oxygen (1778) and hydrogen (1783), and opposed the phlogiston theory. Lavoisier helped construct the metric system, wrote the first extensive list of elements, and helped to reform chemical nomenclature. He predicted the existence of silicon (1787) and was also the first to establish that sulfur was an element (1777) rather than a compound. He discovered that, although matter may change its form or shape, its mass always remains the same.

Lavoisier was a powerful member of a number of aristocratic councils, and an administrator of the Ferme générale. The Ferme générale was one of the most hated components of the Ancien Régime because of the profits it took at the expense of the state, the secrecy of the terms of its contracts, and the violence of its armed agents. All of these political and economic activities enabled him to fund his scientific research. At the height of the French Revolution, he was charged with tax fraud and selling adulterated tobacco, and was guillotined.

Biography

The Collège des Quatre-Nations in Paris

Early life and education

Antoine-Laurent Lavoisier was born to a wealthy family of the nobility in Paris on 26 August 1743. The son of an attorney at the Parlement of Paris, he inherited a large fortune at the age of five upon the death of his mother. Lavoisier began his schooling at the Collège des Quatre-Nations, University of Paris (also known as the Collège Mazarin) in Paris in 1754 at the age of 11. In his last two years (1760–1761) at the school, his scientific interests were aroused, and he studied chemistry, botany, astronomy, and mathematics. In the philosophy class he came under the tutelage of Abbé Nicolas Louis de Lacaille, a distinguished mathematician and observational astronomer who imbued the young Lavoisier with an interest in meteorological observation, an enthusiasm which never left him. Lavoisier entered the school of law, where he received a bachelor's degree in 1763 and a licentiate in 1764. Lavoisier received a law degree and was admitted to the bar, but never practiced as a lawyer. However, he continued his scientific education in his spare time.

Early scientific work

Lavoisier's education was filled with the ideals of the French Enlightenment of the time, and he was fascinated by Pierre Macquer's dictionary of chemistry. He attended lectures in the natural sciences. Lavoisier's devotion and passion for chemistry were largely influenced by Étienne Condillac, a prominent French scholar of the 18th century. His first chemical publication appeared in 1764. From 1763 to 1767, he studied geology under Jean-Étienne Guettard. In collaboration with Guettard, Lavoisier worked on a geological survey of Alsace-Lorraine in June 1767. In 1764 he read his first paper to the French Academy of Sciences, France's most elite scientific society, on the chemical and physical properties of gypsum (hydrated calcium sulfate), and in 1766 he was awarded a gold medal by the King for an essay on the problems of urban street lighting. In 1768 Lavoisier received a provisional appointment to the Academy of Sciences. In 1769, he worked on the first geological map of France.

Lavoisier as a social reformer

Lavoisier conducting an experiment on respiration in the 1770s

Research benefitting the public good

While Lavoisier is commonly known for his contributions to the sciences, he also dedicated a significant portion of his fortune and work toward benefitting the public. Lavoisier was a humanitarian—he cared deeply about the people in his country and often concerned himself with improving the livelihood of the population by agriculture, industry, and the sciences. The first instance of this occurred in 1765, when he submitted an essay on improving urban street lighting to the French Academy of Sciences.

Three years later in 1768, he focused on a new project to design an aqueduct. The goal was to bring water from the river Yvette into Paris so that the citizens could have clean drinking water. But, since the construction never commenced, he instead turned his focus to purifying the water from the Seine. This was the project that interested Lavoisier in the chemistry of water and public sanitation duties.

He additionally was interested in air quality, and spent some time studying the health risks associated with gunpowder's effect on the air. In 1772, he performed a study on how to reconstruct the Hôtel-Dieu hospital, after it had been damaged by fire, in a way that would allow proper ventilation and clean air throughout.

At the time, the prisons in Paris were known to be largely unlivable and the prisoners' treatment inhumane. Lavoisier took part in investigations in 1780 (and again in 1791) on the hygiene in prisons and had made suggestions to improve living conditions, suggestions which were largely ignored.

Once a part of the Academy, Lavoisier also held his own competitions to push the direction of research towards bettering the public and his own work. One such project he proposed in 1793 was to better public health on the "insalubrious arts".

Sponsorship of the sciences

Lavoisier had a vision of public education having roots in "scientific sociability" and philanthropy.

Lavoisier gained a vast majority of his income through buying stock in the General Farm, which allowed him to work on science full-time, live comfortably, and allowed him to contribute financially to better the community. (It would also contribute to his demise during the Reign of Terror many years later.)

It was very difficult to secure public funding for the sciences at the time, and additionally not very financially profitable for the average scientist, so Lavoisier used his wealth to open a very expensive and sophisticated laboratory in France so that aspiring scientists could study without the barriers of securing funding for their research.

He also pushed for public education in the sciences. He founded two organizations, Lycée^[fr] and Musée des Arts et Métiers, which were created to serve as educational tools for the public. Funded by the wealthy and noble, the Lycée regularly taught courses to the public beginning in 1793.

Ferme générale and marriage

Portrait of Lavoisier explaining to his wife the result of his experiments on air by Ernest Board

At the age of 26, around the time he was elected to the Academy of Sciences, Lavoisier bought a share in the Ferme générale, a tax farming financial company which advanced the estimated tax revenue to the royal government in return for the right to collect the taxes. On behalf of the Ferme générale Lavoisier commissioned the building of a wall around Paris so that customs duties could be collected from those transporting goods into and out of the city. His participation in the collection of its taxes did not help his reputation when the Reign of Terror began in France, as taxes and poor government reform were the primary motivators during the French Revolution.

Lavoisier consolidated his social and economic position when, in 1771 at age 28, he married Marie-Anne Pierrette Paulze, the 13-year-old daughter of a senior member of the Ferme générale. She was to play an important part in Lavoisier's scientific career—notably, she translated English documents for him, including Richard Kirwan's Essay on Phlogiston and Joseph Priestley's research. In addition, she assisted him in the laboratory and created many sketches and carved engravings of the laboratory instruments used by Lavoisier and his colleagues for their scientific works. Madame Lavoisier edited and published Antoine's memoirs (whether any English translations of those memoirs have survived is unknown as of today) and hosted parties at which eminent scientists discussed ideas and problems related to chemistry.

A portrait of Antoine and Marie-Anne Lavoisier was painted by the famed artist Jacques-Louis David. Completed in 1788 on the eve of the Revolution, the painting was denied a customary public display at the Paris Salon for fear that it might inflame anti-aristocratic passions.

For three years following his entry into the Ferme générale, Lavoisier's scientific activity diminished somewhat, for much of his time was taken up with official Ferme générale business. He did, however, present one important memoir to the Academy of Sciences during this period, on the supposed conversion of water into earth by evaporation. By a very precise quantitative experiment Lavoisier showed that the "earthy" sediment produced after long-continued reflux heating of water in a glass vessel was not due to a conversion of the water into earth but rather to the gradual disintegration of the inside of the glass vessel produced by the boiling water. He also attempted to introduce reforms in the French monetary and taxation system to help the peasants.

Adulteration of tobacco

The Farmers General held a monopoly of the production, import and sale of tobacco in France, and the taxes they levied on tobacco brought revenues of 30 million livres a year. This revenue began to fall because of a growing black market in tobacco that was smuggled and adulterated, most commonly with ash and water. Lavoisier devised a method of checking whether ash had been mixed in with tobacco: "When a spirit of vitriol, aqua fortis or some other acid solution is poured on ash, there is an immediate very intense effervescent reaction, accompanied by an easily detected noise." Lavoisier also noticed that the addition of a small amount of ash improved the flavour of tobacco. Of one vendor selling adulterated goods he wrote "His tobacco enjoys a very good reputation in the province... the very small proportion of ash that is added gives it a particularly pungent flavour that consumers look for. Perhaps the Farm could gain some advantage by adding a bit of this liquid mixture when the tobacco is fabricated." Lavoisier also found that while adding a lot of water to bulk the tobacco up would cause it to ferment and smell bad, the addition of a very small amount improved the product. Thereafter the factories of the Farmers General added, as he recommended, a consistent 6.3% of water by volume to the tobacco they processed. To allow for this addition, the Farmers General delivered to retailers seventeen ounces of tobacco while only charging for sixteen. To ensure that only these authorised amounts were added, and to exclude the black market, Lavoisier saw to it that a watertight system of checks, accounts, supervision and testing made it very difficult for retailers to source contraband tobacco or to improve their profits by bulking it up. He was energetic and rigorous in implementing this, and the systems he introduced were deeply unpopular with the tobacco retailers across the country. This unpopularity was to have consequences for him during the French Revolution.

Royal Commission on Agriculture

Lavoisier urged the establishment of a Royal Commission on Agriculture. He then served as its Secretary and spent considerable sums of his own money in order to improve the agricultural yields in the Sologne, an area where farmland was of poor quality. The humidity of the region often led to a blight of the rye harvest, causing outbreaks of ergotism among the population. In 1788 Lavoisier presented a report to the Commission detailing ten years of efforts on his experimental farm to introduce new crops and types of livestock. His conclusion was that despite the possibilities of agricultural reforms, the tax system left tenant farmers with so little that it was unrealistic to expect them to change their traditional practices.

Gunpowder Commission

Éleuthère Irénée du Pont (right) and mentor Antoine Lavoisier

Lavoisier's researches on combustion were carried out in the midst of a very busy schedule of public and private duties, especially in connection with the Ferme Générale. There were also innumerable reports for and committees of the Academy of Sciences to investigate specific problems on order of the royal government. Lavoisier, whose organizing skills were outstanding, frequently landed the task of writing up such official reports. In 1775 he was made one of four commissioners of gunpowder appointed to replace a private company, similar to the Ferme Générale, which had proved unsatisfactory in supplying France with its munitions requirements. As a result of his efforts, both the quantity and quality of French gunpowder greatly improved, and it became a source of revenue for the government. His appointment to the Gunpowder Commission brought one great benefit to Lavoisier's scientific career as well. As a commissioner, he enjoyed both a house and a laboratory in the Royal Arsenal. Here he lived and worked between 1775 and 1792.

Lavoisier was a formative influence in the formation of the Du Pont gunpowder business because he trained Éleuthère Irénée du Pont, its founder, on gunpowder-making in France; the latter said that the Du Pont gunpowder mills "would never have been started but for his kindness to me."

During the Revolution

In June 1791 Lavoisier made a loan of 71,000 livres to Pierre Samuel du Pont de Nemours to buy a printing works so that du Pont could publish a newspaper, La Correspondance Patriotique. The plan was for this to include both reports of debates in the National Constituent Assembly as well as papers from the Academy of Sciences. The revolution quickly disrupted the elder du Pont's first newspaper, but his son E.I. du Pont soon launched Le Republicain and published Lavoisier's latest chemistry texts. Lavoisier also chaired the commission set up to establish a uniform system of weights and measures which in March 1791 recommended the adoption of the metric system. The new system of weights and measures was adopted by the Convention on 1 August 1793. Lavoisier himself was removed from the commission on weights and measures on 23 December 1793, together with Laplace and several other members, for political reasons. One of his last major works was a proposal to the National Convention for the reform of French education. He also intervened on behalf of a number of foreign-born scientists including mathematician Joseph Louis Lagrange, helping to exempt them from a mandate stripping all foreigners of possessions and freedom.

Final days and execution

Lavoisier, by Jacques-Léonard Maillet, ca 1853, among culture heroes in the Louvre's Cour Napoléon

As the French Revolution gained momentum, attacks mounted on the deeply unpopular Ferme générale, and it was eventually abolished in March 1791. In 1792 Lavoisier was forced to resign from his post on the Gunpowder Commission and to move from his house and laboratory at the Royal Arsenal. On 8 August 1793, all the learned societies, including the Academy of Sciences, were suppressed at the request of Abbé Grégoire.

On 24 November 1793, the arrest of all the former tax farmers was ordered. Lavoisier and the other Farmers General faced nine accusations of defrauding the state of money owed to it, and of adding water to tobacco before selling it. Lavoisier drafted their defence, refuting the financial accusations, reminding the court of how they had maintained a consistently high quality of tobacco. The court was however inclined to believe that by condemning them and seizing their goods, it would recover huge sums for the state. Lavoisier was convicted and guillotined on 8 May 1794 in Paris, at the age of 50, along with his 27 co-defendants.

According to a (probably apocryphal) story, the appeal to spare his life so that he could continue his experiments was cut short by the judge, Coffinhal: "La République n'a pas besoin de savants ni de chimistes; le cours de la justice ne peut être suspendu." ("The Republic has no need of scientists or chemists; the course of justice cannot be delayed.") Lavoisier was convicted with summary justice of having plundered the people and the treasury of France, of having adulterated the nation's tobacco with water, and of having supplied the enemies of France with huge sums of money from the national treasury.

Lavoisier's importance to science was expressed by Lagrange who lamented the beheading by saying: "Il ne leur a fallu qu'un moment pour faire tomber cette tête, et cent années peut-être ne suffiront pas pour en reproduire une semblable." ("It took them only an instant to cut off this head, and one hundred years might not suffice to reproduce its like.")

Post-mortem

A year and a half after his death, Lavoisier was exonerated by the French government. During the White Terror, his belongings were delivered to his widow. A brief note was included, reading "To the widow of Lavoisier, who was falsely convicted".

About a century after his death, a statue of Lavoisier was erected in Paris. It was later discovered that the sculptor had not actually copied Lavoisier's head for the statue, but used a spare head of the Marquis de Condorcet, the Secretary of the Academy of Sciences during Lavoisier's last years. Lack of money prevented alterations from being made. The statue was melted down during the Second World War and has not been replaced. One of the main "lycées" (high schools) in Paris and a street in the 8th arrondissement are named after Lavoisier, and statues of him are found on the Hôtel de Ville and on the façade of the Cour Napoléon of the Louvre. His name is one of the 72 names of eminent French scientists, engineers and mathematicians inscribed on the Eiffel Tower as well as on buildings around Killian Court at MIT in Cambridge, MA.

Contributions to chemistry

Oxygen theory of combustion

Antoine Lavoisier's phlogiston experiment. Engraving by Mme Lavoisier in the 1780s taken from Traité élémentaire de chimie (Elementary treatise on chemistry)

During late 1772 Lavoisier turned his attention to the phenomenon of combustion, the topic on which he was to make his most significant contribution to science. He reported the results of his first experiments on combustion in a note to the Academy on 20 October, in which he reported that when phosphorus burned, it combined with a large quantity of air to produce acid spirit of phosphorus, and that the phosphorus increased in weight on burning. In a second sealed note deposited with the Academy a few weeks later (1 November) Lavoisier extended his observations and conclusions to the burning of sulfur and went on to add that "what is observed in the combustion of sulfur and phosphorus may well take place in the case of all substances that gain in weight by combustion and calcination: and I am persuaded that the increase in weight of metallic calces is due to the same cause."

Joseph Black's "fixed air"

During 1773 Lavoisier determined to review thoroughly the literature on air, particularly "fixed air," and to repeat many of the experiments of other workers in the field. He published an account of this review in 1774 in a book entitled Opuscules physiques et chimiques (Physical and Chemical Essays). In the course of this review he made his first full study of the work of Joseph Black, the Scottish chemist who had carried out a series of classic quantitative experiments on the mild and caustic alkalies. Black had shown that the difference between a mild alkali, for example, chalk (CaCO₃), and the caustic form, for example, quicklime (CaO), lay in the fact that the former contained "fixed air," not common air fixed in the chalk, but a distinct chemical species, now understood to be carbon dioxide (CO₂), which was a constituent of the atmosphere. Lavoisier recognized that Black's fixed air was identical with the air evolved when metal calces were reduced with charcoal and even suggested that the air which combined with metals on calcination and increased the weight might be Black's fixed air, that is, CO₂.

Joseph Priestley

Joseph Priestley, an English chemist known for isolating oxygen, which he termed "dephlogisticated air"

In the spring of 1774 Lavoisier carried out experiments on the calcination of tin and lead in sealed vessels, the results of which conclusively confirmed that the increase in weight of metals in combustion was due to combination with air. But the question remained about whether it was combination with common atmospheric air or with only a part of atmospheric air. In October the English chemist Joseph Priestley visited Paris, where he met Lavoisier and told him of the air which he had produced by heating the red calx of mercury with a burning glass and which had supported combustion with extreme vigor. Priestley at this time was unsure of the nature of this gas, but he felt that it was an especially pure form of common air. Lavoisier carried out his own researches on this peculiar substance. The result was his memoir On the Nature of the Principle Which Combines with Metals during Their Calcination and Increases Their Weight, read to the Academy on 26 April 1775 (commonly referred to as the Easter Memoir). In the original memoir Lavoisier showed that the mercury calx was a true metallic calx in that it could be reduced with charcoal, giving off Black's fixed air in the process. When reduced without charcoal, it gave off an air which supported respiration and combustion in an enhanced way. He concluded that this was just a pure form of common air, and that it was the air itself "undivided, without alteration, without decomposition" which combined with metals on calcination.

After returning from Paris, Priestley took up once again his investigation of the air from mercury calx. His results now showed that this air was not just an especially pure form of common air but was "five or six times better than common air, for the purpose of respiration, inflammation, and ... every other use of common air." He called the air dephlogisticated air, as he thought it was common air deprived of its phlogiston. Since it was therefore in a state to absorb a much greater quantity of phlogiston given off by burning bodies and respiring animals, the greatly enhanced combustion of substances and the greater ease of breathing in this air were explained.

Pioneer of stoichiometry

Lavoisier's researches included some of the first truly quantitative chemical experiments. He carefully weighed the reactants and products of a chemical reaction in a sealed glass vessel so that no gases could escape, which was a crucial step in the advancement of chemistry. In 1774, he showed that, although matter can change its state in a chemical reaction, the total mass of matter is the same at the end as at the beginning of every chemical change. Thus, for instance, if a piece of wood is burned to ashes, the total mass remains unchanged if gaseous reactants and products are included. Lavoisier's experiments supported the law of conservation of mass. In France it is taught as Lavoisier's Law and is paraphrased from a statement in his "Traité Élémentaire de Chimie" to "Rien ne se perd, rien ne se crée, tout se transforme." ("Nothing is lost, nothing is created, everything is transformed."). Mikhail Lomonosov (1711–1765) had previously expressed similar ideas in 1748 and proved them in experiments; others whose ideas pre-date the work of Lavoisier include Jean Rey (1583–1645), Joseph Black (1728–1799), and Henry Cavendish (1731–1810).

Chemical nomenclature

Lavoisier, together with Louis-Bernard Guyton de Morveau, Claude-Louis Berthollet, and Antoine François de Fourcroy, submitted a new program for the reforms of chemical nomenclature to the Academy in 1787, for there was virtually no rational system of chemical nomenclature at this time. This work, titled Méthode de nomenclature chimique (Method of Chemical Nomenclature, 1787), introduced a new system which was tied inextricably to Lavoisier's new oxygen theory of chemistry. The Classical elements of earth, air, fire, and water were discarded, and instead some 55 substances which could not be decomposed into simpler substances by any known chemical means were provisionally listed as elements. The elements included light; caloric (matter of heat); the principles of oxygen, hydrogen, and azote (nitrogen); carbon; sulfur; phosphorus; the yet unknown "radicals" of muriatic acid (hydrochloric acid), boric acid, and "fluoric" acid; 17 metals; 5 earths (mainly oxides of yet unknown metals such as magnesia, barite, and strontia); three alkalies (potash, soda, and ammonia); and the "radicals" of 19 organic acids. The acids, regarded in the new system as compounds of various elements with oxygen, were given names which indicated the element involved together with the degree of oxygenation of that element, for example sulfuric and sulfurous acids, phosphoric and phosphorous acids, nitric and nitrous acids, the "ic" termination indicating acids with a higher proportion of oxygen than those with the "ous" ending. Similarly, salts of the "ic" acids were given the terminal letters "ate," as in copper sulfate, whereas the salts of the "ous" acids terminated with the suffix "ite," as in copper sulfite. The total effect of the new nomenclature can be gauged by comparing the new name "copper sulfate" with the old term "vitriol of Venus." Lavoisier's new nomenclature spread throughout Europe and to the United States and became common use in the field of chemistry. This marked the beginning of the anti-phlogistic approach to the field.

Chemical revolution and opposition

Antoine Lavoisier is commonly cited as a central contributor to the chemical revolution. His precise measurements and meticulous keeping of balance sheets throughout his experiment were vital to the wide spread acceptance of the law of conservation of mass. His introduction of new terminology, a binomial system modeled after that of Linnaeus, also helps to mark the dramatic changes in the field which are referred to generally as the chemical revolution. Lavoisier encountered much opposition in trying to change the field, especially from British phlogistic scientists. Joseph Priestley, Richard Kirwan, James Keir, and William Nicholson, among others, argued that quantification of substances did not imply conservation of mass. Rather than reporting factual evidence, opposition claimed Lavoisier was misinterpreting the implications of his research. One of Lavoisier's allies, Jean Baptiste Biot, wrote of Lavoisier's methodology, "one felt the necessity of linking accuracy in experiments to rigor of reasoning." His opposition argued that precision in experimentation did not imply precision in inferences and reasoning. Despite opposition, Lavoisier continued to use precise instrumentation to convince other chemists of his conclusions, often results to five to eight decimal places. Nicholson, who estimated that only three of these decimal places were meaningful, stated:

If it be denied that these results are pretended to be true in the last figures, I must beg leave to observe, that these long rows of figures, which in some instances extend to a thousand times the nicety of experiment, serve only to exhibit a parade which true science has no need of: and, more than this, that when the real degree of accuracy in experiments is thus hidden from our contemplation, we are somewhat disposed to doubt whether the exactitude scrupuleuse of the experiments be indeed such as to render the proofs de l'ordre demonstratif.

Notable works

Lavoisier's Laboratory, Musée des Arts et Métiers, Paris

Easter memoir

The "official" version of Lavoisier's Easter Memoir appeared in 1778. In the intervening period Lavoisier had ample time to repeat some of Priestley's latest experiments and perform some new ones of his own. In addition to studying Priestley's dephlogisticated air, he studied more thoroughly the residual air after metals had been calcined. He showed that this residual air supported neither combustion nor respiration and that approximately five volumes of this air added to one volume of the dephlogisticated air gave common atmospheric air. Common air was then a mixture of two distinct chemical species with quite different properties. Thus when the revised version of the Easter Memoir was published in 1778, Lavoisier no longer stated that the principle which combined with metals on calcination was just common air but "nothing else than the healthiest and purest part of the air" or the "eminently respirable part of the air". The same year he coined the name oxygen for this constituent of the air, from the Greek words meaning "acid former". He was struck by the fact that the combustion products of such nonmetals as sulfur, phosphorus, charcoal, and nitrogen were acidic. He held that all acids contained oxygen and that oxygen was therefore the acidifying principle.

Dismantling phlogiston theory

Lavoisier's chemical research between 1772 and 1778 was largely concerned with developing his own new theory of combustion. In 1783 he read to the academy his paper entitled Réflexions sur le phlogistique (Reflections on Phlogiston), a full-scale attack on the current phlogiston theory of combustion. That year Lavoisier also began a series of experiments on the composition of water which were to prove an important capstone to his combustion theory and win many converts to it. Many investigators had been experimenting with the combination of Henry Cavendish's inflammable air, which Lavoisier termed hydrogen (Greek for "water-former"), with dephlogisticated air (oxygen) by electrically sparking mixtures of the gases. All of the researchers noted the production of water, but all interpreted the reaction in varying ways within the framework of the phlogiston theory. In cooperation with mathematician Pierre Simon de Laplace, Lavoisier synthesized water by burning jets of hydrogen and oxygen in a bell jar over mercury. The quantitative results were good enough to support the contention that water was not an element, as had been thought for over 2,000 years, but a compound of two gases, hydrogen and oxygen. The interpretation of water as a compound explained the inflammable air generated from dissolving metals in acids (hydrogen produced when water decomposes) and the reduction of calces by inflammable air (combination of gas from calx with oxygen to form water).

Despite these experiments, Lavoisier's antiphlogistic approach remained unaccepted by many other chemists. Lavoisier labored to provide definitive proof of the composition of water, attempting to use this in support of his theory. Working with Jean-Baptiste Meusnier, Lavoisier passed water through a red-hot iron gun barrel, allowing the oxygen to form an oxide with the iron and the hydrogen to emerge from the end of the pipe. He submitted his findings of the composition of water to the Académie des Sciences in April 1784, reporting his figures to eight decimal places. Opposition responded to this further experimentation by stating that Lavoisier continued to draw the incorrect conclusions, and that his experiment demonstrated the displacement of phlogiston from iron by the combination of water with the metal. Lavoisier developed a new apparatus which utilized a pneumatic trough, a set of balances, a thermometer, and a barometer, all calibrated carefully. Thirty savants were invited to witness the decomposition and synthesis of water using this apparatus, convincing many who attended of the correctness of Lavoisier's theories. This demonstration established water as a compound of oxygen and hydrogen with great certainty for those who viewed it. The dissemination of the experiment, however, proved subpar, as it lacked the details to properly display the amount of precision taken in the measurements. The paper ended with a hasty statement that the experiment was "more than sufficient to lay hold of the certainty of the proposition" of the composition of water and stated that the methods used in the experiment would unite chemistry with the other physical sciences and advance discoveries.

Elementary Treatise of Chemistry

Lavoisier and Berthollet, Chimistes Celebres, Liebig's Extract of Meat Company Trading Card, 1929

Lavoisier employed the new nomenclature in his Traité élémentaire de chimie (Elementary Treatise on Chemistry), published in 1789. This work represents the synthesis of Lavoisier's contribution to chemistry and can be considered the first modern textbook on the subject. The core of the work was the oxygen theory, and the work became a most effective vehicle for the transmission of the new doctrines. It presented a unified view of new theories of chemistry, contained a clear statement of the law of conservation of mass, and denied the existence of phlogiston. This text clarified the concept of an element as a substance that could not be broken down by any known method of chemical analysis, and presented Lavoisier's theory of the formation of chemical compounds from elements. It remains a classic in the history of science. While many leading chemists of the time refused to accept Lavoisier's new ideas, demand for Traité élémentaire as a textbook in Edinburgh was sufficient to merit translation into English within about a year of its French publication. In any event, the Traité élémentaire was sufficiently sound to convince the next generation.

Physiological work

Lavoisier (wearing goggles) operates his solar furnace to prevent contamination from combustion products.

The relationship between combustion and respiration had long been recognized from the essential role which air played in both processes. Lavoisier was almost obliged, therefore, to extend his new theory of combustion to include the area of respiration physiology. His first memoirs on this topic were read to the Academy of Sciences in 1777, but his most significant contribution to this field was made in the winter of 1782/1783 in association with Laplace. The result of this work was published in a memoir, "On Heat." Lavoisier and Laplace designed an ice calorimeter apparatus for measuring the amount of heat given off during combustion or respiration. The outer shell of the calorimeter was packed with snow, which melted to maintain a constant temperature of 0 °C around an inner shell filled with ice. By measuring the quantity of carbon dioxide and heat produced by confining a live guinea pig in this apparatus, and by comparing the amount of heat produced when sufficient carbon was burned in the ice calorimeter to produce the same amount of carbon dioxide as that which the guinea pig exhaled, they concluded that respiration was in fact a slow combustion process. Lavoisier stated, "la respiration est donc une combustion," that is, respiratory gas exchange is a combustion, like that of a candle burning.

This continuous slow combustion, which they supposed took place in the lungs, enabled the living animal to maintain its body temperature above that of its surroundings, thus accounting for the puzzling phenomenon of animal heat. Lavoisier continued these respiration experiments in 1789–1790 in cooperation with Armand Seguin. They designed an ambitious set of experiments to study the whole process of body metabolism and respiration using Seguin as a human guinea pig in the experiments. Their work was only partially completed and published because of the disruption of the Revolution; but Lavoisier's pioneering work in this field served to inspire similar research on physiological processes for generations to come.

Legacy

Antoine-Laurent Lavoisier by Jules Dalou 1866

Lavoisier's fundamental contributions to chemistry were a result of a conscious effort to fit all experiments into the framework of a single theory. He established the consistent use of the chemical balance, used oxygen to overthrow the phlogiston theory, and developed a new system of chemical nomenclature which held that oxygen was an essential constituent of all acids (which later turned out to be erroneous).

Lavoisier also did early research in physical chemistry and thermodynamics in joint experiments with Laplace. They used a calorimeter to estimate the heat evolved per unit of carbon dioxide produced, eventually finding the same ratio for a flame and animals, indicating that animals produced energy by a type of combustion reaction.

Lavoisier also contributed to early ideas on composition and chemical changes by stating the radical theory, believing that radicals, which function as a single group in a chemical process, combine with oxygen in reactions. He also introduced the possibility of allotropy in chemical elements when he discovered that diamond is a crystalline form of carbon.

He was also responsible for the construction of the gasometer, an expensive instrument he used at his demonstrations. While he used his gasometer exclusively for these, he also created smaller, cheaper, more practical gasometers that worked with a sufficient degree of precision that more chemists could recreate.

He was essentially a theorist, and his great merit lay in his capacity to take over experimental work that others had carried out—without always adequately recognizing their claims—and by a rigorous logical procedure, reinforced by his own quantitative experiments, expounding the true explanation of the results. He completed the work of Black, Priestley and Cavendish, and gave a correct explanation of their experiments.

Overall, his contributions are considered the most important in advancing chemistry to the level reached in physics and mathematics during the 18th century.

Awards and honours

During his lifetime, Lavoisier was awarded a gold medal by the King of France for his work on urban street lighting (1766), and was appointed to the French Academy of Sciences (1768).

Lavoisier's work was recognized as an International Historic Chemical Landmark by the American Chemical Society, Académie des sciences de L'institut de France and the Société Chimique de France in 1999. Antoine Laurent Lavoisier's Louis 1788 publication entitled Méthode de Nomenclature Chimique, published with colleagues Louis-Bernard Guyton de Morveau, Claude Louis Berthollet, and Antoine François, comte de Fourcroy, was honored by a Citation for Chemical Breakthrough Award from the Division of History of Chemistry of the American Chemical Society, presented at the Académie des Sciences (Paris) in 2015.

A number of Lavoisier Medals have been named and given in Lavoisier's honour, by organizations including the Société chimique de France, the International Society for Biological Calorimetry, and the DuPont company.

Selected writings

The work of Lavoisier was translated in Japan in the 1840s, through the process of Rangaku. Page from Udagawa Yōan's 1840 Seimi Kaisō

Opuscules physiques et chimiques (Paris: Chez Durand, Didot, Esprit, 1774). (Second edition, 1801)
L'art de fabriquer le salin et la potasse, publié par ordre du Roi, par les régisseurs-généraux des Poudres & Salpêtres (Paris, 1779).
Instruction sur les moyens de suppléer à la disette des fourrages, et d'augmenter la subsistence des bestiaux, Supplément à l'instruction sur les moyens de pourvoir à la disette des fourrages, publiée par ordre du Roi le 31 mai 1785 (Instruction on the means of compensating for the food shortage with fodder, and of increasing the subsistence of cattle, Supplement to the instruction on the means of providing for the food shortage with fodder, published by order of King on 31 May 1785).
(with Guyton de Morveau, Claude-Louis Berthollet, Antoine Fourcroy) Méthode de nomenclature chimique (Paris: Chez Cuchet, 1787)
(with Fourcroy, Morveau, Cadet, Baumé, d'Arcet, and Sage) Nomenclature chimique, ou synonymie ancienne et moderne, pour servir à l'intelligence des auteurs. (Paris: Chez Cuchet, 1789)
Traité élémentaire de chimie, présenté dans un ordre nouveau et d'après les découvertes modernes (Paris: Chez Cuchet, 1789; Bruxelles: Cultures et Civilisations, 1965) (lit. Elementary Treatise on Chemistry, presented in a new order and alongside modern discoveries)
(with Pierre-Simon Laplace) "Mémoire sur la chaleur," Mémoires de l'Académie des sciences (1780), pp. 355–408.
Mémoire contenant les expériences faites sur la chaleur, pendant l'hiver de 1783 à 1784, par P.S. de Laplace & A. K. Lavoisier (1792)
Mémoires de physique et de chimie (1805: posthumous)

In translation

Essays Physical and Chemical (London: for Joseph Johnson, 1776; London: Frank Cass and Company Ltd., 1970) translation by Thomas Henry of Opuscules physiques et chimiques
The Art of Manufacturing Alkaline Salts and Potashes, Published by Order of His Most Christian Majesty, and approved by the Royal Academy of Sciences (1784) trans. by Charles Williamos^[54] of L'art de fabriquer le salin et la potasse
(with Pierre-Simon Laplace) Memoir on Heat: Read to the Royal Academy of Sciences, 28 June 1783, by Messrs. Lavoisier & De La Place of the same Academy. (New York: Neale Watson Academic Publications, 1982) trans. by Henry Guerlac of Mémoire sur la chaleur
Essays, on the Effects Produced by Various Processes On Atmospheric Air; With A Particular View To An Investigation Of The Constitution Of Acids, trans. Thomas Henry (London: Warrington, 1783) collects these essays:

"Experiments on the Respiration of Animals, and on the Changes effected on the Air in passing through their Lungs." (Read to the Académie des Sciences, 3 May 1777)
"On the Combustion of Candles in Atmospheric Air and in Dephlogistated Air." (Communicated to the Académie des Sciences, 1777)
"On the Combustion of Kunckel's Phosphorus."
"On the Existence of Air in the Nitrous Acid, and on the Means of decomposing and recomposing that Acid."
"On the Solution of Mercury in Vitriolic Acid."
"Experiments on the Combustion of Alum with Phlogistic Substances, and on the Changes effected on Air in which the Pyrophorus was burned."
"On the Vitriolisation of Martial Pyrites."
"General Considerations on the Nature of Acids, and on the Principles of which they are composed."
"On the Combination of the Matter of Fire with Evaporable Fluids; and on the Formation of Elastic Aëriform Fluids."

“Reflections on Phlogiston”, translation by Nicholas W. Best of “Réflexions sur le phlogistique, pour servir de suite à la théorie de la combustion et de la calcination” (read to the Académie Royale des Sciences over two nights, 28 June and 13 July 1783). Published in two parts:

Best, Nicholas W. (2015). "Lavoisier's "Reflections on phlogiston" I: Against phlogiston theory". Foundations of Chemistry. 17 (2): 361–378. doi:10.1007/s10698-015-9220-5.
Best, Nicholas W. (2016). "Lavoisier's "Reflections on phlogiston" II: On the nature of heat". Foundations of Chemistry. 18 (1): 3–13. doi:10.1007/s10698-015-9236-x.

Method of chymical nomenclature: proposed by Messrs. De Moreau, Lavoisier, Bertholet, and De Fourcroy (1788) Dictionary
Elements of Chemistry, in a New Systematic Order, Containing All the Modern Discoveries (Edinburgh: William Creech, 1790; New York: Dover, 1965) translation by Robert Kerr of Traité élémentaire de chimie. ISBN 978-0-486-64624-4 (Dover).
- 1799 edition
- 1802 edition: volume 1, volume 2
- Some illustrations from 1793 edition
- Some more illustrations from the Science History Institute
- More illustrations (from Collected Works) from the Science History Institute

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