The 1936 issue of Merck's Jahresberichte is its fiftieth anniversary. Professor Heubner's short preface portrays with great exactness the spirit of the entire enterprise of Merck as a firm, scientific research institution and literary review exchange of pharmacotherapy and pharmacy. There is one article on modern methods of drug and pharmaceutical analysis which discusses microchemical procedures. That this review appears from the control laboratory of E. Merck, Darmstadt, proves Merck's far-sighted leadership in the pharmaceutical field. The description of a new class of drugs, namely, the derivatives of coumarin-3-carboxylic acid, is especially well done. Also valuable is a pharmacologic investigation of European official and unofficial herbs. The Jahresberichte are most valuable for pharmaceutical control and research institutions and should be in the libraries of all educational centers.