This is a valuable addition to the literature on the subject. It is a readable volume, and, for most practitioners, will be found more satisfactory than many of the elaborate works which treat of the various phases of the subject in more detail. It presents a summary of what is known of the customs of all peoples as regards sexual selection, betrothal, marriage, divorce, etc., and the relation of the sex problem to modesty, vanity, poverty, wealth, morality, Christianity, civilization, virtue and the welfare of the race. In the main, the attitude of the author is judicial, broad-minded and helpful, but he has been led far astray in his endeavor to treat the subject with entire disregard of so-called prudery. Sexual matters should be treated with perfect frankness, particularly in a work for physicians, but we can not justify the author in his facetious and flippant manner of telling unnecessary