Harry M Marks, the Progress of Experiment: Science and Therapeutic Reform in the United States, 1900–1990, Cambridge History of Medicine, Cambridge University Press, 1997, Pp. Xii, 258, £45.00, $59.95 (Hardback 0-521-58142-7), £14.95, $19.95 (Paperback 0-521-78561-8).