REVIEWS OF RECENT BOOKS

PROFESSOR K ONIG, in his introduction to this important work, claims that it is now possible to cure almost all cases of myoma and of uterine hmnorrhage without operation. A t the Freiburger '' Frauenklinik " Professor Kronig and Gauss have four Riintgen installations in constant use for some ten hours a day. Briefly, the improvements introduced into the technique consist in the use of thick filters, 3 m.m. of aluminium lined with three layers of paper, the use of hard x-ray tubes, absolute skin protection, and heavy dosage. The skin protection is ensured by the use of many points of entry, and efficient protection by filters. The technique has been carefully elaborated as the result of many experiments on the physical properties of x-rays and the relative values of filters of varying thickness. In a series of early cases the technique advocated by Altus Schonberg of Hamburg was used, and from this the present Freiburg technique has been evolved. The first part of the book is devoted to a theoretical discussion of the physics of deep irradiation and is admirably dealt with, the subject is treated at great length and is illustrated by a number of physical and biological experiments. The book concludes with a history of zoo cases ; a consideration of these demonstrates the gradual development of the technique from the commencement when small doses were given, to that of the present day when enormous irradiation, distributed over many points of entry, are given in a few days. With the increase in the number of points of entry the intensity of the irradiation has greatly increased as has also the thickness of the filter employed. An analysis of the cases quoted reveals the great value of the x-ray treatment of uterine myoma , in selected cases. Time must of course be allowed to elapse in order to prove the permanency of the results, but if the percentage of cures should fall far short of that claimed by the authors, it will still show a remarkable degree of success in the treatment of those conditions. It is well to emphasise the need for care in the selection of the cases for treatment, such cases should be at or near the menopause, and stress should be laid upon the need for expert gynzecological examination of a11 cases about to be treated. Any case with a suspicion of malignancy should not be subjected to x-ray treatment if an operation is possible. The book is admirably written and shows evidence of painstaking investigation of obscure points in dosage, filtration, and the condition of the x-ray bulb. It forms a valuable contribution to the list of diseases which yield to x-ray treatment, and should be of immense value to all gynaxologists and radiologists interested in the new method of treatment. By Dr. C. J. GAUSS and Dr. H. LEMCKE. Professor KRONIG. Price 17 marks.