Portrait of Herman N. Eisen, MD (1918-2014). Dr. Eisen received his MD from New York University College of Medicine in 1943. He taught at New York University College of Medicine as a Fellow in Medicine (1947-1948), Assistant in Medicine (1948-1949), Assistant Professor of Industrial Medicine (1949-1953), and Associate Professor of Industrial Medicine (1953-1955). In 1968, Dr. Eisen received the Medical Alumni Scientific Award on Alumni Day. An important researcher in the field of immunology, he was influential in establishing the usefulness of equilibrium dialysis with purified antibodies and the affinity of combining sites.