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1Casa Biochemica, Rueil-Malmaison, France, and the Department of Chemistry, the College of the City of New York
1
Earlier papers have appeared in the Proc. Soc. Exp. Biol. Med. (1929), 26, 325 and 569, in the report of the Thirteenth International Physiological Congress (1929), p. 89, and in the Amer. J. Physiol. (1930), 92, 440.