Jean Pierre Lonis Girardin, a French chemist, born in Paris, Nov. 16, 1803. He has popularized chemistry by teaching its application to art, industry, and agriculture, as professor at Rouen from 1838 to 1858, and since at Lille and Clermont. In 1835 he published Lecons de chimie elementaire (2 vols.; 4th revised and illustrated ed., 1860-62). which has been translated into Russian. His other writings include manuals of pharmacy, botany, and chemistry, Melanges d' agriculture, d'economie rurale et publique, et de sciences physiques appliquees (2 vols., 1852), and Des fumiers et autres engrais animaux (6th revised, enlarged, and illustrated ed., 1864).