While the faults of the book, which are chiefly those of omission, detract from its value and usefulness, it is clear to the reviewer that it will prove of value to the student of organic chemistry who has completed the usual text-book course in the subject, and is about to prepare for further work by a more detailed study of synthetical methods. The book contains a great many facts, well arranged and clearly put.James F. Norris.Technologie der Fbtte und Oele. Handbook of the Preparation and Industry of the Animal and Vegetable Fats, Oils and Waxes. By Gustav Hefter, Director of the Triest Vegetable Oil Company, with the assistance of G.