460 BOOK NOTICES

toxin carried by the blood circulation and acting on the reticulo-endothelial tissue; and it may arise from a non-perforating injury. Just as a poly-morphonuclear increase is indicative of a septic focus, so a high mononuclear increase would appear to indicate that a toxin is present which is particularly dangerous to the eye.

The report contains sixteen excellent plates, the first of which is of the beau­tiful ophthalmic hospital at Giza. The report is a model of its kind and it would be well if the vast wealth of clinical material passing through our own institutions were as effectively used.

Park Lewis.

Bericht der Deutschen Ophthalmolo-gischen Gesellschaft, 1930. Edited by the Secretary, A. Wagenmann. Paper, octavo, 432 pages, 206 illus­trations, 38 tables in the text. Munich, J. F. Bergmann, 1930.

This report of the forty-eighth meet­ing of the Heidelberg Congress, held June 12, 13, and 14, maintains the inter­est and scientific importance of this series of meetings, which started as a gathering of friends of Albrecht Graefe. This meeting was held under the presi­dency.of Theodore Axenfeld, who died July 29, 1930. In attendance were 204 of its members, German ophthalmolo­gists, with 39 guests, while 76 of the eminent German ophthalmologists pre­sented or discussed papers here pub­lished.

The volume sustains the reputation of its predecessors for presentation of scientific facts and therapeutic devices, and illustrates the interest of German ophthalmologists in detail and in philo­sophic or theoretic discussions. It also indicates the fondness which those who contribute to it have for mechanical elaboration and highly developed ma­chinery. The disposition to make ap­paratus minutely accurate, but unduly complex, often limits its application to practical service. This tendency has been observed lately in America and Britain, and is strongly evident in some

of the papers on new instruments and procedures in this volume.

While titles like "What is neutral light", "Experimental studies of results of diphtheric infection of the eyes", "The crossing of sensory and motor tracts", "Internal secretions and eye diseases", may seem academic, it should be noted that the present technique for Gonin's operation on detached retina was what brought out the most general discussion, by sixteen speakers; and among the forty-five papers and twen­ty-five demonstrations included in the program were many devoted to very practical subjects. Evidently, in spite of problems of reparations and in spite of the influence of post-war psychol­ogy, Germany has not abdicated her leadership in ophthalmology.

Edward Jackson.

Indications for kinetic treatment of the eyes. N. A. Stutterheim, M.D., Johannesburg, South Africa. Paper, octavo, 82 pages, illustrated with 11 charts. London, George Pul-man and Sons, 1930.

This is a thesis approved for the de­gree of doctor of medicine in the Uni­versity of Witwatersrand, South Afri­ca ; and is one of a series of monographs published in the same general form as the British Journal of Ophthalmology. The headings are: introduction, meth­ods of investigation, experiments and results, discussions, conclusions, sum­mary, references, and integral survey of results of 100 cases of kinetic treatment for asthenovergence. This is a good piece of literary work, discussing de­fective ocular movements partly from a new point of view.

The introduction contains a summary of the literature, bringing together ex­pressions from Donders, Duane, Sher-rington, Parsons, Worth, Kappers and others, that justify the young writer in considering the subject of defective oculomotor coordinations from his par­ticular point of view. Then follows an emphasis on "involuntary convergence" and "stimulotrope movement". Of the latter the author says: "Convergence,