Document VJONmEZrp30YO8ovx2z7g7ZJ8

industrial Hygiene Digest - 44 ..... ______ January, 1950 0 are elightiy lover than those determined by standard methods, The flamma bility in air of binary liquid mixtures of which one constituent is incom bustible is examined experimentally in the particluar case of h-hexane and difluarodichloromethane (freon 12), and a form of diagram is "proposed to express the results .' With the aid of a general diagram of the same kind the influence of mixture compos it ion, temperature and volatility on the flammability of binary mixtures of the same type is discussed. -- Authors' Summary 142 Extinguishing Burning Liquids by the Application of Non-inflammable Gases and Liquids;' JJ. Burgoyne and JJF. Richards on. Fuel 28, 150-150 (July, 1949). Die mechanisms by -which the application of an incombustible gas or liquid may lead to fire extinction are discussed. Results are reported of measurements of the necessary concentration of the non-flammable compound required far.the extinction of combustion of certain liquids. The non flammable compounds studied were carbon dioxide, freon 12, and the vapors of methyl bromide and carbon tetrachloride applied to the air supporting combustion, and liquid methyl bromide and carbon tetrachloride applied to the liquid phase. The relations of the results to liquid and vapor flammability characteristics are discussed. -- Authors'Summary 143 What's flew in Mining Safety. J.J. Forbes and S.H. Ash. Mining Trans. Amer. Institute Meteorological Engineers 184, (Mining Eng. 1,) 349-357 (Oct. 1949). Alio published as Technical Paper 2553A, AJME. " "Probably the newest thing in mining safety is the apparent dlssatls faction an the part of the mineral industries, as represented by both management and labor, and the general public of the Ration, with the safety record of the mining industry." However, progress has been made: the anthracite industry has set a new safety record; as have many individual companies. A number of changed details in.codes, regulations, and union . agreements are cited as contributions to Bafety, and the number of indivi dual accomplishments of the research program of the Bureau of Mines are listed. Progress has also been made in safety education. 144 Promoting Eye Safety. A.G. Bungenstock. Sight-Saving Bev. 1, p. 79 (1949). The Issuance of 22,000 pairs of safety glasses,'cost the Western Electric Company, Kearny, H.J. about $58;000. Die result over a period of time in vhich 24 palrB of glasses were shattered is an estimated saving of $14,000. A more important consideration is that these 24 employees still have unimpaired vision. -- Condensed from Arch. Ind. Hyg. (fe.Occ. Med 145 Coal Getting Machines and Safety. E.J. Danlell. Coll. Guard. Overseas Suppl. pp. 17-23 (Dec. 1949). Ibis paper describes the means, for mechanical and electrical pro tection incorporated in the principal types of mining machinery and briefly discusses other safety measures auch as'safety lamps; fire extinguishers, and precautions ag&lhst inflammable gases. ..