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v=$ &J. a References to Recent Literature - 4 15 REGARDING THE BOOK "LUNG FIBROSIS OF MINERS" BY L. C.'iOZIBR, E. MaRTIN AND A. POLICARD. Magnin. Med. du travail 1J), 97-118 (1938). (French), The three authors who collaborated on the book belong to a group of French phy sicians who hold that silicosis can be diagnosed roentgenologically only with great difficulty and that it can only develop on a preexistont tuberculosis. In France it has still not been included os a compensable disease. Magnin, in an open lettor, criticizes the book and says it only serves to strengthen the views of oxperts in all other countries. It is stated that the authors havo done vio lence to their own facts to strengthen their own views, and it is emphasizod how beneficially the recognition of silicosis as. an industrial disoaso in other coun tries has effected provention itself as is shown by the record in tho South African mines. 16 SILICOSIS; THE PATIENTS. M. Conrozior and I, Magnin. Med. du travail, 10, .173-248 (1936). (French). The authors have observed 1T1 patients, of whom they have 300 x-rays. They pub lish numerous case histories and only a few in the group havo boon complicated by tuberculosis. They present very exact reports and excellent descriptions, all to prove that silicosis is a soparate disease entity caused by dust, which is not necessarily complicated v/ith tuberculosis. Such r.n argument is necessary in France, whore cortain physicians (see proceeding abstract) oppose this view which is accepted elsewhere throughout the world. 17 THE SILICOSIS RISK IN THE POTTERY INDUSTRY. D.F.K. Bishop. Ceramic Age 52, 146-7 (November 1938). (Reprinted from on article in a British publication.) The author umphasir.os tne importance of the silicosiB risk in the pottery indus try and says that although it haj only recently been made a compensable disease (England, 1929) it hns been wall known in the past as "potter's asthma" and "potter's rot." He discusses tho results of trials in the chinaware scotion in replacing flint by alumina as a bedding raatorial, and reports that one firm found definite advantages. It has boon shown that workers exposed to alumina dust, in some casos for aa long as 39 years, experienced no lung changes. The author re views ten items to be stressed in maintaining good dust control and makes a plea for observance of the'rules in spirit as well os in the letter. 18 SILICOSIS IN THE MONUMENT MANUFACTURING INDUSTRY IN VIRGINIA. Bureau of Indus trial Hygiene, Virginia Stato Department of Health Bulletin, 23 pp. (1938). Following a preliminary survey of dusty trade3 in Virginia, a more detailed study of the monument industry was conducted. This industry in Virginia consists in a small number of plants which process granito monuments, mostly in open-air planti Tho survey included the determination of dust concentrations and the examination cf about one-half of the workers by X-ray. The dust concentrations found dispellod the idea that out-of-doors work involved no hazard, as they were well above the llmltB in nearly all casus. Tho total dust oxpesures of the workers was difficult to estimate howovor, because of the irregularity of their duties and variability of the types of work. The X-ray examinations disclosed that about 25 per cent of the 45 workers exeminod had involvement of the lungs from tho silica dust; 8 of the men were diagnosed as having silicosis and 3 as having silicosis complicated with infection. On the basis of theso findings, recommen dations (which ar listed in tho bullotin) wore made to the industry on control measures to reduce tho dust concentrations to safe limits. 19 SILICA DUST EXPOSURE OF ROCK DRILLERS IN NE.Y YORK QUARRIES. L.Greenburg, C.B. Ford, A.J, Eurke and B.H. Dolin. Ind. Dull. J2, 575-7 (December 1938). Under the Mew York rock drilling codes, the rock formations are divided into two classes with regulations as follows: Class I--rock with less than 10% free sili ca. and Class II--rock with mere than 10% free silica. Maximum allowable dust HW88-Q609778