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Joseph L., French naturalist, 1778-1850. See: Gay-Lussac equation, Gay-Lussac law.
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Some of these crystals ended up in the hands of Gay-Lussac and Ampere who gave some to Davy.
Although Courtois discovered iodine in 1811, it was Gay-Lussac who proved that it was a new element and gave it the name of "iode" from the Greek "ioeides" meaning violet colored.
Table 1 The Halides: Discovery in Chronological Order Halide Year Discoverer Country Chloride 1809 Gay-Lussac France 1810 H.
En efecto, tomando en consideracion la ley de los volumenes de combinacion de los gases de Gay-Lussac, y el hecho de que todos los gases, independientemente de su naturaleza quimica, obedecen a las mismas leyes, dedujo de esto una clara significacion general.
Antes de la formulacion de esta teoria de los tipos, Gerhardt, basandose en las leyes establecidas por Gay-Lussac, Mariotte y la hipotesis de Avogadro y Ampere y observando las relaciones entre los pesos de los volumenes de las combinaciones organicas al estado de vapor con aquel de vapor de agua, consiguio una diferenciacion bien marcada del concepto de molecula: del atomo y del equivalente que, a la sazon, se confundian.
There he attended the lectures of Gay-Lussac and Thenard and learned how to analyze organic materials.
Collaboration with Gay-Lussac led to a memoir on the fulminates.
In 1832, Gay-Lussac [4] succinctly summarized Berthollet's work on reactions and chemical compounds as follows "Berthollet avait raison propos des reactions, elles produisent en general un equilibre entre constituants, qui depend des conditions de reaction; il avait tort en ce qui concerne les composes produits".
The striking versatility of Berthelot coupled with his remarkable drive brings to mind the earlier impressive exploits of his celebrated compatriot Joseph Louis Gay-Lussac (1778-1849) that were also characterized by wide variety and great quantity [19].
He was named professor of organic chemistry at Ecole de Medecine in 1829, and three years later was appointed Assistant Professor at the Sorbonne, where he was to succeed the famous Joseph Louis Gay-Lussac in 1841 [3].
Joseph Louis Gay-Lussac is well-known for his discovery of the law of combining gas volumes which was published in 1809 in a paper entitled "Sur la combinaison des substances gazeuses, les unes avec les autres" [1].
Gay-Lussac possessed the qualities of versatility, brilliance, lucidity, perseverance, patience, and audacity, as well as fine experimental skills; and all of these were to play a part in his various activities.

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