This is a book for laymen, purporting to give advice in the self-treatment of neurasthenia. Incidentally the author relates his own theories and achievements. Among other things he asserts his ability to count the brain-beats and to judge of the character of the nervous system by the mere placing of his hand on the patient's forehead. The putting forth of these wild theories and boastful assertions does not seem without a purpose. We learn that the author of this booklet owns and operates a sanatorium in Europe which is patronized by the wealthy idle. The intelligent layman, who has in our own country run the gauntlet of the various faithcults, will hardly fall into this new trap.