About Joseph Louis Gay-Lussac
Joseph Louis Gay-Lussac (6 December 1778 – 9 May 1850) was a French chemist and physicist. He is known mostly for his discovery that water is made of two parts hydrogen and one part oxygen by volume (with Alexander von Humboldt), 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. Gay-Lussac was born at Saint-Léonard-de-Noblat in the present-day department of Haute-Vienne. Towards the year 1803, father and son formally adopted the name Gay-Lussac. Gay-Lussac received his early education at the hands of the Catholic Abbey of Bourdeix.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.