The author dedicates this work to his former master, Prof. Hebra, one who certainly deserves this and any honour that the profession in this country has in its power to bestow, for the many thoroughly educated pupils he has sent back to her, as well as for his unparalleled services in the advancement of dermatology. Of the former certainly no one is more accomplished or better fitted by temperament to write a new book on skin diseases than Dr. Duhring. It has been his object to prepare a

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... and practical treatise for the use of the practitioner, without attempting to make it exhaustive, or a medium for the discussion of dis¬ puted points, or the presentation of theoretical questions in dermatology ; and we are happy to say in the beginning that' lie has succeeded admirably. The nomenclature and classification are mainly those of Hebra-as the simplest and best system yet devised, we agree with the author in believing ; that he did not attempt a new one we congratulate him and all students of dermatology. The illustrations, sixteen in number, representing sections of the healthy skin and the vegetable and animal parasites, are simple and good. The book is well printed, and makes a handsome volume of six hundred and eighteen pages. The first part is general in character, devoted to an exposition of the anatomy of the healthy skin, and to concise considerations of the symp¬ tomatology, etiology, pathology, diagnosis, treatment, and prognosis of its diseased conditions. To this difficult and important portion of his work the author has given careful attention, and a close study of it, before consulting that which treats of the special diseases, will well repay the general reader. Its definitions and descriptions are clear and com¬ prehensive, and the points upon which we should take issue with the author are few and of minor consequence. In his account of vesicles and their formation, he states that the anatomical seat is "between the mucous and horny layers of the epidermis." We should have said that this is so in some cases, while in others the separation of the tissues by the serum is wholly within the rete, and that in others the cavity is formed between the cells of the horny layer. The author is inclined to regard diet as a prime factor in the causation of skin diseases, not, as he admits, that this can be directly demonstrated, but because he finds some error of digestion in so many cutaneous affec¬ tions. " Each part of the digestive tract," he says, " should be gone over in turn, with leading questions, assuming for the most part, that some functional trouble does exist. Here, in the alimentary canal, we may find the key which will disclose the cause of a great number of skin