Oscar Riddle

Oscar Riddle was a Carnegie Institution staff scientist at the Station for Experimental Evolution from 1914–1945. He was an expert on the morphology and physiology of pigeons. In 1932 he isolated the hormone prolactin from the anterior pituitary gland and demonstrated that it produced lactation.



Oscar Riddle, center, with staff, 1927    







The article, "A New Hormone of the Anterior Pituitary," 1932, one of Riddle's seminal papers.