Document mB9axEZo1xD1e3JkqDxNG5BJZ

$m3 CO v=0 -- -S'! Digest of Industrial Hygiene - 21. than in a "hot vet" one (87.5 dry bulb. 83$ relative humidity) both haring tb same effective temperature Index. Uso of saline solution instead of water. Is beneficial In a "hot wet" atmosphere, but appears to be disadvantageous in a hot dry one. 498 Cutaneous Diffusion of Halium in Halation to Peripheral Blood flow and the Ab sorption of Atmospheric nitrogen through the Skin. A. fiohnke end T. Willmon. Am. J. Physiol.. 131. 687-32 (January. 1941). Tbo subject's body was Issuersed to the neck In helium and the exhaled hellvia wi aoaoured. After 30 to SO minutes, when equilibrium was established, at 27-28l between 40 and 60 cc. of halium per hour diffused through the skin, passed to 1 lungs end was oxhsled. At 35C. the diffusion was about 170 oo. of halloa por hour. This temperature effect Is explained ohlofly on the basis of an increaS4 cutaneous blood flow. In similar experiments with the body surrounded with oxygon, the nitrogen elimination deoroasod from 47 ac. to between 24 end 34 oc. per hour, returning to normal when the body la again surrounded by air. There* fore undar similar conditions tho nitrogen diffusion la loss than 50$ of that of hollus. 499 Coseous Hltrogen and Hollua 31x31nation from the Body durlte Dost and Exercise. A. Bohnke rad T. Willmon. An.J.Physiol. 131. 619-26 (January. 1941). After a mixture of 73 to 7C$ helium, 5-7$ nitrogen and 20$ oxygen wne breathed for 3 hours, about 60$ of tho halium was found to leave the tissues during the first hour. Exercise on a stationary bicycle increased tho halloa elimination, for instance, 60$ over a 13 nlnuto period of exorcise. The elimination ct nit) gen is rapid during tho first 2 houre and then slower until an end-point Is reached somewhere between 9 end 12 hours, Exorolse produces masted Increase 1) nitrogen elimination. The addition of helium to the inhnlod oxygen- did not interfere with tho rmov&l of nitrogen from tho body tissues. This a helium dlvo will require about oho half the period of decompression neoessary for an air dive. 500 Health Hazards in the Finishing of Metals. N.B. Pramiael. Products Finishing 5, 18-28 (November, 1940); 52-61 (December, 1940). Tho subject is covered briefly but comprehensively In two papers. The first con3ldors tho subjective factors in health hazards, including race, sex, age, living habits, personal characteristics, experience and familiarity with parti lor operations and susceptibility to particular hazards, followed by the objee tive factors, which include tenpsreture, humidity, ventilation, dampness, radl tion, illmlnation, electricity, noises, vibration, and neuroaoa. In the soco paper the effoots of particular poisons are considered, especially hydrocarbon and chlorinated hydrocarbons. Benzene,- toluene, xylene, petrolem distillates turpontlno, carton tetrachloride, the chlorethylenea, tetrachlorsthane, ethyle dlchloride and chlorbenzenes aro discussed at least briefly, with safety limit for the mst Important ones. General safety rules are inoluded. 501 Industrial Poisoning of tho Nervous System. H. Voss. Fortschr. Geb. Nervenkra p. 161 (1939J; Zentr. Geworbohyg. Unvorfallhut. 27, 303 (1940). (German). A review of tho following industrial poisons and thoir effect on the nervous system: lead, mercury, arsenic, manganese, benzene and its faomologs, nltro cc pounds of benzene, pbenylhydrazlne, benzine, chloroform, carbon tetrachloride, carbon disulfide, hydrogen sulfide and carbon monoxide.