sábado, 12 de mayo de 2012

Some about Georges Louis Leclerc, Count of Buffon





Georges Louis Leclerc (later Count de Buffon) was born at Montbard, in the Province of Burgundy from a family of servants. Georges attended the Jesuit College of Godrans in Dijon, then studied law as requisite for continuing the family tradition in civil service. In 1728 Georges left Dijon to study mathematics and medicine at the University of Angers in Switzerland in 173 where he made the camaraderie with the young English Duke of Kingston, and traveled with him for a year and a half through southern France and parts of Italy. There are persistent but completely undocumented rumors from this period about duels, abductions and secret trips to England. In 1732 Georges left Kingston and returned to Dijon. Having added “de Buffon” to his name while traveling with the Duke. With a fortune of about 80 000 livres legacy of his family, Buffon set himself up in Paris to pursue science, at first primarily mathematics and mechanics, and the increase of his fortune.

In 1732 he moved to Paris, where he made the acquaintance of Voltaire and other intellectuals. He first made his mark in the field of mathematics and, in his Sur le jeu de franc-carreau, introduced differential and integral calculus intoprobability theory; the problem of Buffon's needle in probability theory is named after him. In 1734 he was admitted to the French Academy of Sciences. During this period he corresponded with the Swiss mathematician Gabriel Cramer.

His protector Maurepas had asked the Academy of Sciences to do research on wood for the construction of ships in 1733. Soon afterward, Buffon began a long-term study, performing some of the most comprehensive tests to date on the mechanical properties of wood. Included were a series of tests to compare the properties of small specimens with those of large members. After carefully testing more than a thousand small specimens without knots or other defects, Buffon concluded that it was not possible to extrapolate to the properties of full-size timbers, and he began a series of tests on full-size structural members.

In 1739 he was appointed head of the Parisian Jardin du Roi with the help of Maurepas; he held this position to the end of his life. Buffon was instrumental in transforming the Jardin du Roi into a major research center and museum. He also enlarged it, arranging the purchase of adjoining plots of land and acquiring new botanical and zoological specimens from all over the world.

Thanks to his talent as a writer, he was invited to join Paris's second great academy, the Académie Française in 1753. In his Discours sur le style ("Discourse on Style"), pronounced before the Académie Française, he said, "Writing well consists of thinking, feeling and expressing well, of clarity of mind, soul and taste .... The style is the man himself" ("Le style c'est l'homme même"). Unfortunately for him, Buffon's reputation as a literary stylist also gave ammunition to his detractors: The mathematician Jean le Rond D'Alembert, for example, called him "the great phrase-monger".

In 1752 Buffon married Marie-Françoise de Saint-Belin-Malain, the daughter of an impoverished noble family from Burgundy.


Publications:

Buffon's Histoire naturelle, générale et particulière (1749–1788: in 36 volumes; an additional volume based on his notes appeared in 1789) was originally intended to cover all three "kingdoms" of nature but the Histoire naturelle ended up being limited to the animal and mineral kingdoms. "Written in a brilliant style, this work was read ... by every educated person in Europe".

In the opening volumes of the Histoire naturelle Buffon questioned the usefulness of mathematics, criticized Carl Linnaeus's taxonomical approach to natural history, outlined a history of the Earth with little relation to the Biblical account, and proposed a theory of reproduction that ran counter to the prevailing theory of pre-existence. The early volumes were condemned by the Faculty of Theology at the Sorbonne. Buffon published a retraction, but he continued publishing the offending volumes without any change.

In the course of his examination of the animal world, Buffon noted that despite similar environments, different regions have distinct plants and animals, a concept later known as Buffon's Law. This is considered to be the first principle of biogeography. He made the suggestion that species may have both "improved" and "degenerated" after dispersing from a center of creation. In volume 14 he argued that all the world's quadrupeds had developed from an original set of just thirty-eight quadrupeds. On this basis, he is sometimes considered a "transformist" and a precursor of Darwin. He also asserted that climate change may have facilitated the worldwide spread of species from their centers of origin. Still, interpreting his ideas on the subject is not simple, for he returned to topics many times in the course of his work.

Buffon considered the similarities between humans and apes, but ultimately rejected the possibility of a common descent. He debated with James Burnett, Lord Monboddo on the relationship of the primates to man, Monboddo insisting, against Buffon, on a close relationship.

At one point, Buffon propounded a theory that nature in the New World was inferior to that of Eurasia. He argued that the Americas were lacking in large and powerful creatures, and that even the people were less virile than their European counterparts. He ascribed this inferiority to the marsh odors and dense forests of the American continent. These remarks so incensed Thomas Jefferson that he dispatched twenty soldiers to the New Hampshire woods to find a bull moose for Buffon as proof of the "stature and majesty of American quadrapeds". Buffon later admitted his error.

In Les époques de la nature (1778) Buffon discussed the origins of the solar system, speculating that the planets had been created by a comet's collision with the sun.[8] He also suggested that the earth originated much earlier than 4004 BC, the date determined by Archbishop James Ussher. Basing his figures on the cooling rate of iron tested at his Laboratory the Petit Fontenet at Montbard, he calculated that the age of the earth was 75,000 years. Once again, his ideas were condemned by the Sorbonne, and once again he issued a retraction to avoid further problems


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