916 BOOK NOTICES

on the total intracapsular accommoda­tion of the crystalline lens. Among novelties presented to the Congress may be noted a new type of skiascope shown by Balacco. Two discs, each carrying ten lenses, and capable of ro­tation so that any lens can be brought before either eye, are supported by a headband on the patient's head. The patient can rotate any lens before his eye, according to the instruction of the observer making the test. Contino presents an optotype, of variable size, for testing visual acuity. This is mounted on a firm stand and the size of the type, a capital V, is exactly con­trolled by a mechanical adjustment.

Good work is being done in Italy, in the direction of ophthalmic science,

■ and some of the best is being published thru this annual national congress and its transactions. E. J.

Ocular Affections of Dental Origin. Rogerio Marcus da Silva, M.D. Paper, 8vo., 126 pages. Published (in Portugese) by the Faculty of Medicine and Surgery of San Paulo, Brazil.

This work was submitted and de­fended by its author, as a thesis for the medical degree which he was awarded in January, 1926. It gives an historical sketch, tracing the development of the subject from Hunter 1771, thru Beers and Travers in the early 19th century, to the numerous papers relating to it, that have appeared in the last 20 years.

The manner in which affections are transmitted, from foci more or less dis­tant, to the eyeball and orbit receives considerable attention, taking up one by one the various ocular lesions that arise in this way. A better understand­ing of the pathogenesis of these affec­tions of dental origin, is essential to more exact and effective treatment.

The argument of the author is sup­ported by illustrative cases; including, hemorrhagic chorioneuroretinitis, exu­dative chorioretinitis eczematous keratoconjunctivitis, hypopion ulcer of the cornea, uveitis, retrobulbar neuritis and reflex disturbances. The latter are not illustrated by new cases, but most conditions that are represented in the literature are mentioned.

This monograph brings together in rational relations many parts of anatomy and pathology, to elucidate these conditions; and express con­servative balanced judgment, regard­ing these affections. E. J. La Jonoforesi Nella Cura Medica Delia

Cataratta. Prof. A. AngeluccL Paper, 8 vo., 80 pages. Naples, Tipografia Editrice Tocco, 1926.

This is a paper presented to the Royal Academy of Medicine of Naples. I t may be said to consist of four parts : First a survey of the various sugges­tions that go back almost as far as the history of medicine, that cataract might be amenable to medical treatment, local or general. Second, references to various suggestions of the use of elec­tricity and iodides for cataract. Third, attempts to use iontophoresis by various writers, and the apparatus they employed, including his own work in this direction. Fourth, he gives an outline report of 51 cases subjected to this treatment and the results obtained as indicated by the visual acuity.

The time that these cases were under observation varied, from a few days to several months. They generally show improvement in vision at the end of treatment; as from 1/20 to 1/8, or from 2/3 to 10/10. But the complete ab­sence of data as to the refractive condi­tions in these eyes, or the size of pupils at the various tests, leaves the evidence they afford indefinite and inconclusive. The monograph raises a presumption, that the treatment of cataract by ionto­phoresis may have some value and is worthy of additional trial and observa­tion. E. J. Aviation Medicine: By Louis Hope-

well Baier. A.B., M.D. Major, Medical Corps, United States Army, Commandant The School of Aviation Medicine. Published by authority of the Surgeon General, Baltimore. The Williams. and Wilkins Company.

The literature of Aviation Medicine has not heretofore been collated into a volume and is scattered thru many hundred publications. As the develop­ment of aviation progresses the medi­cal profession must keep pace. Flying