1. Copenhaver, J. H., Nagler, M. E., and Goth, A., J. Pharm. Exp. Therapy, 109, 401 (1953).
2. Hagen, P., Brit. J. Pharmacol. Chemotherapy, 9, 100 (1954).
3. Michels, N. A., in Downey, H., “Handbook of Hematology”, 1 (Paul Hoeber, Inc., New York, 1938).
4. Schneider, W. C., in “Manometric Techniques and Tissue Metabolism” (Burgess Publishing Co., 1951).
5. Riley, J. F., and West, G. B., J. Physiol., 120, 528 (1953). Riley, J. F., Science, 118, 332 (1953).