Merck & Co., Inc., has again provided a complete manual of therapeutics and materia medica. Thirteen hundred and twenty pages are devoted to various illnesses, arranged in alphabetical order and discussed briefly from the point of view of etiology, diagnosis, therapy, prophylaxis and treatment. This section is followed by a table of doses in which the drugs are arranged alphabetically. There is a presentation of facts about the preparations distributed by Merck & Co., Inc., and miscellaneous tables complete the book. This manual should prove exceedingly handy as a reference book for any physician.