Denys Cochin
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Denys Cochin was the son of Pierre-Suzanne-Augustin Cochin, also a politician and writer. After graduating from the school Louis-le-Grand, he joined the military as a quartermaster in the eight cuirassier, before becoming flag carrier for General Charles Denis Bourbaki. After the end of the Franco-Prussian War in 1871, he was an attache in the embassy in London for a year. Returning to France in 1872, he undertook studies in chemistry in the laboratory of Louis Pasteur. During World War I, he worked on the development of explosives and chemical weapons.

