COHEN, Jacob Da Silva Solis, physician, born in New York City, 28 February, 1838. He was educated at the Philadelphia central high school, and, after attending medical lectures, received his diploma from the University of Pennsylvania in 1860. In 1858-'9 he lived in Memphis, Tennessee He was appointed assistant surgeon to the 26th Pennsylvania regiment in April, 1861, and in the same year became assistant surgeon in the navy. He accompanied Dupont's expedition to Port Royal, and remained in the South Atlantic blockading squadron till January, 1864, when he resigned, but served for several months in army hospitals in Philadelphia. After a year in New York, he returned to Philadelphia in 1866. Dr. Cohen has made a specialty of diseases of the throat and chest, and is lecturer on laryngoscopy at Jefferson medical College, Philadelphia. He is consulting physician of several Philadelphia hospitals, and a member of many medical societies. In 1875 he was president of the Philadelphia northern medical association. Among his publications the most important are " Treatise on Inhalation" (Philadelphia, 1867 ; 2d ed., 1876); " Diseases of the Throat" (New York, 1872); and "Croup in its Relations to Tracheot-only" (Philadelphia, 1874).