This edition marks another step in the standardization of chemical and physical methods of control and research in agriculture and related fields by the Association of Official Agricultural Chemists. A review of the fourth edition (The Journal, May 15, 1937, p. 1742) covered the general subject matter. The present volume has been expanded to more than seven hundred pages, with the addition of subject matter for chapters on fish and other marine products, vitamins, microbiologic methods and microchemical methods. Significant additions have been made to chapters on drugs, dairy products, grain and stock feeds, standard solutions, and oils, fats and waxes. The material is presented in a condensed form, covering a large variety of subjects. It is a valuable addition to the analyst's library.