THE "Peace Year Book, 1937" (London: National Peace Council. 2s.) contains a good deal of useful information on international affairs and should prove a reliable book of reference on the peace movement throughout the world. It includes directories of peace organizations in Great Britain, of national organizations, Anglo-foreign societies and local peace organizations as well as peace and kindred organizations abroad. The appendixes include the text of the Covenant of the League of Nations, a bibliography of books and pamphlets, notes on the reform of the League, the Mandates System, an analysis of the armaments situation and an extensive summary by Dr. Hilda Clarke of the report of the Royal Commission on the Private Manufacture of and Trading in Anns. The first part of the book contains articles on international affairs, the situation in Spain receiving special attention, and the work of the League of Nations in 1936 is reviewed by Maurice Fanshawe. Of special interest to scientific workers is an able article in the second part of the book by J. D. Bernal on "Science and Peace", in which some account is given of the work of the Science Commission of the World Peace Congress. The general resolution on the attitude of scientific workers to war is given in full, together with the report of the Science Sub-Commission, and Mr. Bernal indicates some of the responsibilities of men of science in this matter.