Nicolas Chervin, a French physician, celebrated for his researches into the nature and treatment of yellow fever, born at St. Laurent d'Oingt, near Lyons, Oct. 6,1783, died at Bour-bonne-les-Bains in 1843. In pursuance of his inquiries into the types of fevers, and particularly of typhus, he spent some time in the mili-tary hospitals of Mentz, and formed the opinion that typhus is not contagious, but appears so from its rapid propagation. In 1819, Dr. Lassis having contended that yellow fever is no more contagious than typhus, Chervin determined personally to investigate the subject. With this view he set out for the West Indies, and visited successively Santo Domingo, Guadeloupe, Martinique, New Orleans, and Cayenne. During his five years' search he only met with the disease in sporadic cases, never in its epidemic form; but by thoroughly investigating these, and secretly dissecting several bodies, he became convinced that yellow fever is noncontagious. On his return to France he was made a member of the legion of honor, but passed the rest of his life in great poverty, writing innumerable papers to prove that yellow fever is not contagious, and that quarantine regulations neither prevent nor check it.