HOPPE-SEYLER, FELIX German physiolo gist, became in 1856 assistant to Virchow in Berlin, in 1864 professor of applied chemistry at Tubingen and in 1872 professor of physiological chemistry at Strasbourg. He pursued important researches on blood and metabolism, and was the first to obtain lecithin in the pure state. His most important studies concern milk, bile, urine and chlorophyll. He wrote a handbook of chem ical analysis applied to physiology and pathology (1858) and a treatise on physiological chemistry (1877).