CONTRIBUTORS TO VOLlJME .I11 RACHEL BARRETT, Harriet Lane Home, Johns Hopkins Hospital, Baltimore, Margland FLOYDS. Dmr, Department of Physiology, Naiional Institute of Health, Rethesda, Maryland E. C . D O ~ D S Courtauld , Instilule of Biochemistry, Middlesex Hospital, London, TV.1, England MILTONELKIN, Lederle Laboratories, Pearl River, N . Y . A. BAIRD HASTINGS, Harvard Medical School, Boston, Mass. B. C. J. G. KNIGHT,Welkome Physiological Research Laboralories, Langley Court, Beckenham, Kent, England THOMAS MOORE,Dzinn Nutritional Laboratory,. Cambridge, England DAVID NACHMANSOHN, Department of Neurology, College o j Physicians and Surgeons, New York, N . Y . VICTORA. XAJJAR, Department oj Pediatrics, Johns Hopkins Hospital, Baltimore, Afary1an.d W. H. SEBRELL, Department of Physiology, National Institute of Health, Rethesdn, M a y l a n d Y. SUBBAROW, Lederle Laboratories, Pearl River, N . Y. FELIXSULMAN, Hormone ReRearch Laboratorg of the Hebrew Univerdy , JemLsalem, Palestine JOSEPH WARKANY, Childrens Hospital Research Poundation, Cincinnati, Ohio BERNHARD ZONDEK, Hormone Research Laboratoy of the Hebrew University, Jerusalem, Palestine