Jean Baptiste Le Roy

Jean-Baptiste Le Roy was an 18th-century French physicist and one of the major contributors to the Encyclopédie by Diderot and d’Alembert for technology. The son of 18th-century Parisian clockmaker and watchmaker Julien Le Roy, he had three brothers: Pierre (1717–1785), a brilliant clock-maker in his own right, Julien-David (1724–1803), a neo-classical architect and archaeologist, and Charles a physician and Encyclopédiste.