[Guillaume Louis].  French scientific writer, born at Montpellier on the 15th of February 1819. He studied chemistry there, and in 1841 received the degree of M.D. He was appointed professor at the Montpellier School of Pharmacy in 1846, and in 1853 went to Paris to occupy a similar post there. He wrote Exposition et Histoire des Principales Découvertes Scientifiques Modernes (1851); L’Alchimie et les Alchimistes (1854); Histoire du Merveilleux dans les Temps Modernes (1859–60); Les Nouvelles Conquêtes de la Science (1883–85); Les Mystères de la Science (1887). A number of his popular presentations of science and natural history have been translated into English, including The Vegetable World; The Ocean World; The Wonders of Science; and The Wonders of Industry. He died in Paris on the 9th of November 1894. See also Primitive Man.