DR. TUCKERMAN reported a case where a gall stone the size of a pigeon's egg was found post mortem, but which during life could sometimes be felt through the abdominal wall and sometimes not, and which gave rise to a bruit so distinct as to warrant a strong suspicion of aneurysm. DR. VANCE stated that according to his observation the passage of a gall stone into the intestine by ulceration was a common cause of intestinal obstruction. He also called attention to the value of the symptom of itching as pointing to the gall bladder as the seat of the difficulty. DR. LINHART reported a post mortem in a case of typhoid fever where eighty-five small stones were found in the gall bladder. The bladder was but little distended. NEW BOOKS. 'TRAITE PRATIQUE DES MALADIES DE LA PEAU; DIAGNOSTIC ET TRAITEMENT.' Par M. Le Docteur E. Guibot, Medecin De L' Hopital Saint Louis, Paris, etc. This, the fourth work which the author has written on dermatology, is intended to present, in a clear and concise way, a resumé of the more voluminous books which have preceded it. Unfortunately the dermatology of to-day, as it appears in the English language, is drawn largely from the precepts of the Vienna school. In fact, since the little volume of Robert Liveing, which appeared in London about eight years ago, there has been no truly English or American treatise on the subject; although books on diseases of the skin have appeared in quick succession, they have been vague echoes from the _Krankenhaus in Wien._ Do not think from this that I undervalue the original work done by the great teachers of local dermatology, for they have taken vast strides in the advancement of the science, but other lines of thought and investigation are needed to broaden the scope of the earnest student. The work before me, as its name implies, is a practical treatise on diseases of the skin, of about four hundred pages, with especial attention to diagnosis and treatment. To facilitate the former, the author has grouped cutaneous maladies which are alike in nature into what he calls _Diatheses_, of which the syphilitic, scrofulous, herpetic, cancerous and the congestive are dwelt upon. In differentiating the scrofulous from the syphilitic diatheses, the author says: “In the third stage of syphilis, as we have said, the work of destruction starts from within, attacking first the deeper structures, as the periostium cartilage and bone, whereas scrofula pursues the same destructive course inversely; that is to say, from the superficial to the deep parts. This consideration, upon which we cannot insist too strongly, is of the greatest importance in diagnosis. For example, if syphilis attacks the nose, the part first involved is the mucous membrane of the nasal fosæ, then the nasal bones and cartilages, which may become completely destroyed before the process subsides, leaving the nose flattened but the skin intact. In scrofula the work of