Claude Boniface Collignon (died 1819) was a French attorney who contributed to scientific and social reforms in the time of the French Revolution. He was a member of several European academies of sciences, though not the French Academy of Sciences. In 1788 he proposed the introduction of decimal time.Découverte d'étalons justes, naturels, invariables et universels: pour la réduction à une parfaite uniformité de tous les poids et mesures partout, par des moyens simples, avantageux à tout le monde, et faciles à executer In 1790, perhaps disappointed that the French government had not immediately rewarded him for the plan, he sent his book to George Washington, and proposed to introduce his system in the US.Letter to George Washington from Claude-Boniface Collignon, 15 March 1790
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