Joseph Louis Gay-Lussac

Chemist and Physicist.

Joseph Louis Gay-Lussac (6 December 1778 – 9 May 1850) was a French chemist and physicist. He is known mostly for two laws related to gases, and for his work on alcohol-water mixtures, which led to the degrees Gay-Lussac used to measure alcoholic beverages in many countries.

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Source:

1.) Ramesh Chopra (2005). Academic Dictionary Of Philosophy. Gyan Books. p. 143. ISBN 9788182052246. "Renowned French chemist. He was one of the greatest chemists in Europe at the time. He made innumerable discoveries in the science, and even the restored royalty made him a Peer of France, although he worked politically with the anti-clericals. He was closely associated with Arago and shared his atheism."