Koch, Robert (b. 1843), a distinguished German physician, was born in the Hartz district. Having taken his M.D. degree in 1866 at Gottingen, he was from 1872 to 1879 attached to a medical department at Woolstein. He had already made important discoveries in connection with consumption and cattle disease, when in 1883 he was sent to India by the German Government to inquire into the causes of cholera. The result was the discovery of the bacterium in 1884. In 1885 he became professor of hygiene at Berlin, and in 1892 rendered important services in connection with the cholera epidemic at Hamburg.