Claude Louis Berthollet

Claude Louis Berthollet (9 December 1748 Talloires, France – 6 November 1822 Arcueil, France) was a Savoyard-French chemist who became vice president of the French Senate in 1804. He is known for his scientific contributions to theory of chemical equilibria via the mechanism of reverse chemical reactions, and for his contribution to modern chemical nomenclature. On a practical basis, Berthollet was the first to demonstrate the bleaching action of chlorine gas, and was first to develop a solution of sodium hypochlorite as a modern bleaching agent.

Biography

Claude Louis Berthollet was born in Talloires, near Annecy, then part of the Duchy of Savoy, in 1749.

He started his studies at Chambéry and then in Turin where he graduated in medicine. Berthollet great development in works regarding chemistry made him, in a short period of time, an active participant of the Academy of Science in 1780.

Berthollet, along with Antoine Lavoisier and others, devised a chemical nomenclature, or a system of names, which serves as the basis of the modern system of naming chemical compounds.

Claude Louis, Comte de Saint-Germain

Claude Louis, Comte de Saint-Germain (15 April 1707 – 15 January 1778), French general, was born on the 15th of April 1707, at the Château of Vertamboz.

Educated at Jesuit schools, he intended to enter the priesthood, but at the last minute obtained from Louis XV an appointment as sub-lieutenant. He left France, according to the gossip of the time, because of a duel; served under the Elector Palatine; fought for Hungary against the Turks, and on the outbreak of the war of the Austrian Succession (1740) joined the army of the elector of Bavaria (who later became emperor under the name of Charles VII), displaying such bravery that he was promoted to the grade of lieutenant field-marshal.

He left Bavaria on the death of Charles VII, and after brief service under Frederick the Great joined Marshal Saxe in the Netherlands and was created a field-marshal of the French army. He distinguished himself especially at Lauffeld, Rocoux and Maastricht. On the outbreak of the Seven Years' War (1756) he was appointed lieutenant-general, and although he showed greater ability than any of his fellow-commanders and was admired by his soldiers, he fell a victim to court intrigues, professional jealousy and hostile criticism. He resigned his commission in 1760 and accepted an appointment as field-marshal from Frederick V of Denmark, being charged in 1762 with the reorganization of the Danish army.