born June 3, 1904, Washington, D.C., U.S.
died April 1, 1950, near Burlington, N.C.
U.S. physician and surgeon.
He received his Ph.D. from Columbia University. While researching the properties and preservation of blood plasma, he developed efficient ways to process and store plasma in blood banks. He directed the U.S. and Britain's World War II blood-plasma programs until 1942. An African American, he resigned over the segregation of the blood of blacks and whites in blood banks.