Anyone interested in the subject of pigment, whether physician, biologist, chemist, or physicist, will find this an excellent source book, for it contains papers and discussions read at a meeting "designed to offer to each specialist an opportunity to explore paths of inquiry other than his own—to describe, perhaps explain and certainly to discuss the nature of the pigment cell and its contained melanin." The subject matter deals with the embryologic, genetic, endocrinological, pathological, physiological, and enzymatic problems of melanogenesis, as well as methods of study and treatment of normal and abnormal pigment cell growth in man. The medical research student will, of course, find the entire volume of value; the clinician will appreciate particularly the papers on acanthosis nigricans and those dealing with different phases of melanoma, all written by authorities in the field. An unusual feature is a report of a postconference session for the adoption of uniform