Medicine: Father to Son

One of the world's wealthiest, least understood and least publicized organizations for seeking out scientific knowledge got a new boss last week. Down from the presidency of the Rockefeller Institute for Medical Research stepped John Davison Rockefeller Jr., 76, to make way for a younger man. The younger man: his youngest son, David, 35, onetime secretary to New York City's late Mayor Fiorello La Guardia. In World War II he rose from private to captain, is now a vice president of the Chase National Bank.

Just 50 years ago John D. Rockefeller Sr. became...