An enlarged edition of this German monograph makes its appearance a little more than a year after the first. The authors again have succeeded in putting in brief form an extraordinary amount of information on the vitamins. The newer material includes a more detailed discussion of the functions of vitamin A with particular reference to its possible therapeutic uses, a discussion of the "filtrate factor" of the vitamin B complex, a brief account of vitamin K and a paragraph with references on the recent work on vitamin P. The monograph will prove most useful as a source of suggestions regarding further clinical studies, particularly on the vitamins available in crystalline form.
This book, in conjunction with other articles on the vitamins, emphasizes the need for a suitable international system of biochemical nomenclature. Early in 1937 Szent-Györgyi reported the presence of a substance, associated with vitamin C in nature, which was