Document 3N0EkL0r9eM38ZqNXkm9o2rqn

trial Hygiene Digest - 23 June, 1953 siderosia, berylliosis, asbestosis, and the organic dust diseases are dis cussed briefly in relation to diagnosis. The importance of personal and occu pational history is emphasized. The factors to be considered when deciding whether a man should be taken from his job are discussed. The Clinical Picture and Pathology of Asbestosis. W. Behrens, Jr. Z. Unfallmed, u. Berufkrankh. 4fL 129-140 (June 15, 1952); 179-189 (eept. 15, 1952). German. This paper presents an extensive review of literature on asbestosis including distribution and types of asbestos, its mining, treatment, and use, dust hazards, and effects of length of exposure of the dust in different con centration. Symptomatology, diagnosis, and x-ray findings in the different stages of asbestosis are described. Special mention is made of the association oi asbestosis with carcinoma, which is much more frequent than that of sili cosis. Post-mortem reports from the literature indicate that in 309 cases oi asbestosis there were 44 lung carcinomas (14.2%), whereas in 2,204 cases of silicosis only 32 carcinomas were found (1.4%), The experience of the association of tuberculosis and asbestosis varies greatly in different countries. English investigators have recorded a high rate of tuberculous infection in asbestos workers, but it is a rare complication in America and the rate is low in Germany- The macroscopic and microscopic appearances of the lungs are described, and the nature and significance of asbestosis bodies are discussed and an extensive reference list dealing with that controversial subject is given. -- Cond. from Bull. Hyg. t bung Carcinoma Caused by Asbestos Inhalation; Med. Monatsschr. IP, 77-81 (1953) German. F. Boemlce. The relation between fibrotic changes caused by asbestos deposits in the lung and carcinoma is discussed. The lower lobe is the site of pre dilection. Characteristic are the multicentered developments of flat epi- theliurn carcinoma. -- Chem, Absts. PHYSICAL ASPECTS OF THE ENVIRONMENT barbon Dioxide and Respiratory Regulation at Altitude. F. G. T-Iall.. I Appl. Physiol. 5, 603-606 (April iyt>3). Fourteen young men exposed to a simulated altitude of 22,000 feet breathed gas mixtures with varying concentrations of carbon dioxide. The I ores sure s of oxygen and carbon dioxide in alveole r air were correlated