1. Wasserman, F., in Handbook of Physiology. Sect. 5: Adipose Tissue, edit. by Renold, A. E., and Cahill, G. F., jun. (American Physiological Society, Washington, D. C., 1965).
2. Simon, G., in ref. 1.
3. Napolitano, L., in ref. 1.
4. Bell, E. T., Amer. J. Anat., 9, 412 (1909).
5. Clark, E. R., and Clark, E. L., Amer. J. Anat., 67, 255 (1940).