Book Review Individuality of the Blood in Biology and in Clinical and Forensic Medicine . By Professor Leone Lattes, Director of the Institute of Forensic Medicine in the University of Modena, and translated by L. W. Howard Bertie, M.A., B.M., B.Ch. (Oxon.) from the French edition of 1929, thoroughly revised and brought up to date by the Author. Oxford University Press, London: Humphrey Milford. 413 Pages. Price $7.50.