Document ypJp73xn2qG56G4J79RJ318yn

frCustrlal Hygiene Digest A'mim. IQfitt .vr-U-7nu, 'he line particle# uhouid be prevented /ran:bocumliig air Imrue. In mntu indus tries oil i sprayed on fiuuly divided materials to unuso thu fitiv particles *to adhere tu larger particle*. Tli? sourevu and treatment of dust in thu glue* industry >ind the secondary source of dust Iron* power plants a re dlscutfsou. Modern tnuthod* of treatment may be applied to all types of procoesr*. Automatic controls which reduce the human ciument to a minimum pro* vide dependable operation. Theao systems, properly applied, give complete dust control wlik'h in turn yields bolter quality control, lower equipment maintenance costs, und lower operating costs. -- APCA Abets, '7? iVmuniuecnfroMa in DUtomacuous Earth Workers. A, AMmark, T, Bruce and N. Nyxtroin. Nord. Mud. j. 289-290 (Ilov. 20, l?5d). iHatomaceou* earth deposits in Sweden are exploited only in a few places and to a relatively limited extent. Pneumoconiosis is reported in i oisn engaged in quarrying, drying and pulvor:i:ng dialomaceous earth. In all is, the disease Itud reached xtage U1 |Joh.nm.'9U;rg scale). Advanced pneumoconiosis was pruoent in 2 men after only 10 year* exposure. Tuberc ulous compllcoiiuus were not demonstrable. All 3 were nevertheless totally disabled by their diseaao. In one man, pneumoconiosis was the main cause of death. APCA Absts. 776 Unusual Manifestations of Silicosis. C. S. Morrow*, Tuberculology J_d, 3S-38 (Sept. 19*9), Two unusual ease histories are presented. Thu first was a case of silicotic pneumu- lithiasis and the second a caae of Caplan's syndrome. The exact etiology of thu Caplan type of pneumoconiosis ha# been the subject oi speculation. The possibility that the lung lesions are solely a manifestation of rheumatoid arthritis and unrelated to pneumoconiosis, hat not been accepted, A probable explanation is that the tissue T99pt>no to infection, tuberculous or other wise, which ordinarily results in conglomerate masses, is modified by the rheumstoid st.U to produce instead the Caplan lesion. The clinician is urged to be aware of this enydrotnu since it mey be confuted with metastatic malignancy of the lung. -- APCA Absia. I ?7T Non-Typical Forms of Lung Silicosis. M. Weber. Med. Pracy (Lode) 9, 387-396 (195b). The author emphasises the frequency of the non-typical forms of silicosis and dis cusses the classiiUeiion of these forms. Baico on His own material, he describes die obsutved ease* of the following different forms of silicosis: acute silleoslss sitU-sls with a low course of disease; cases with a great difference between the clinical and radiological picture: end silicotic cases which are radiologically non-typicel. All of these non-typical forms create some difficulty in the evaluation of different periods of silicosis, and stress the necessity of taking Into consideration in oach instance the clinical picture se a whole, -- APCA Absts. Jb Cllnlco-Radioloplcal Assessment of Silicosis with Autopsy Comparison. H. Lent and H. Gravenkamp. Bsitr. Sllikose-Forsch. No. 62, 1-76 (1939). Gorman. The authors describe Investigations carried out on M2 Ruhr coal miners, in whom an autopsy was performed within 2 years of clinical assessment. The chest x-rays were re- svrutiniaed and reclassified In the light of the clinical findings before the morbid ai.s'.^my * studied. Eligibility for compensation under the workmen's compensation sch*>:. \ Mured and errors in awarding compensation are included as mis-diagnoae*. ** wrre finally compared with the lung aections and hiatological reports. Ihv method of classifying silicosis into 3 stages was usad. In 18 (12. 7%) of cases there a as a discrepancy of at least one stage between the cUnfco-radiofogfcaf and pathological assess ments, but in only )3 (9.7%) was this considered as undoubtedly due to faulty radiological chwsiflcatlon. In 6 cases the amount of sJUeosia was overestimated, in 3 underestimated, or. :!te chest x-ray. In 7 cases.the assessment of compensation was at fault. Reasons fur the disagreement are discusaed and numerous Illustrative cases are described in great detail. - Bull, Hyg. 19,