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THIS is the fourth volume of a series published as the Annals of Roentgenology under the editorship of James T. Case, M.D. It opcns with a foreword by Rudolph Matas, which describes in a most interesting manner the growth of our knowledge of bones in their structure and development which has sprung from Roentgen's discovery of 1805. The work itself is admirabk in its simplicity and clearness. For the most part i t deals only with the normal bones at their articular extremities. Therc are six chapters devoted t o the main joints of both upper and lower extremities. Each chapter begins with a series of extracts from standard works on anatomy and surgery, giving the current views about the devcloprnent of the epiphyses. Then follow excellently reproduced X-rays of the joint in question, taken a t various ages from infancy up t o adult life. These are of the utmost value in giving definite evidence about the centres of ossification and their dates of fusion, and also in providing reference plates with which any given clinical condition may be compared. Only in connection with the elbow-joint is any detailed refcrence made t o traumatic conditions. We would suggest that i t would be of the utmost value if typical injuries were figured of all the regions described, and also if the varying normal conditions of the shafts of the bones, as well as their extremities, were given a t different periods of life, especially those of old age. The book will be an invaluable work of reference. Diagnostic et Traitement des Maladies de la VGsicule biliaire par l'lxcre'tion vesiculaire provoqu6e. By M. CHIRAY and BI. MILOCIIEVITCH, l'aris. Crown Bvo. Pp. 156, with 13 illustrations. 1924. l'aris : Masson et Cie. Fr. 12. A NUMBER of tests have been devised whereby a flow of bile is excited and the resulting fluid collected through a duodenal tube. I n this book the theoretical basis and the practical application of such tests arc discussed. Stimulation of the duodenal mucosa by 80 per cent magnesium sdphate (Meltzer-Lyon test) is the method most under consideration, but the use of 5 to 10 per cent peptone (Stcpp's test) and sul-
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