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
 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 .
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 .
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" .