The appearance of a third edition of this work within three years indicates that it satisfies a real want. The textbook type of presentation is probably more valuable than the direct question and answer with which physicians have long been familiar. The author has successfully resisted the temptation to enlarge the scope of the work and in so doing has assured continued success in the field for which it was intended. Nevertheless there has been a careful revision of the entire work, and new chapters have been added on hypertension and arthritis. Until the states provide more general and more satisfactory arrangements for reciprocity, a work of this kind will be needed by all those who after long years of practice are compelled to undergo elementary examinations in medicine and the medical sciences.