Proceedings of the second international congress of surface activity. J. H. SCHULMAN, Editor. Vol. I: Gas/Liquid and Liquid/Liquid Interface, 521 pp., $15.00. Vol. II: Solid/Gas Interface, 348 pp., $12.60. Vol. III: Electrical Phenomena. Solid/Liquid Interface, 621 pp., $16.80. Vol. IV: Solid/Liquid Interface (Washing etc.) Cell/Water Interface (Biological), 352 pp., $12.60. Complete set $50.00. Academic Press, New York, 1958