Document qm7djaN6vxGoLv6MrKwvmp37k

Industrial Hygiene Digest - 38 *1 *' AUgUflt, IQIiQ methods as veil as good care and maintenance techniques for the existing equipment. Such efforts vill result In still more comfortable working conditions, provided veil established and recommended care Is applied to the existing systems. Seduction of possible hatards to men-and equipment vill result In still more efficient production, If the recommendations of the plant maintenance engineers and the manufacturers are put Into effect. i i Same of the know-how has been summarized an the previous pages, and It may be pointed out again that more Information is obtainable through the list of catalogs and booklets and references to articles in periodicals, pre t sented on page twelve. -- Author'a Summary 1 933 Dusty Air as a Vehicle of Infection. C.C. Spencer. 1 Modern Sanitation 1, 14-ltJ, 53-(July -1949).-------- The high proportion of respiratory Infections among communicable di t t seases baa been established. The relative importance of airborne trans mission of these diseases has not been demonstrated, but etudles and cli 1 nical experience have shown that Infected air Is an Important source of contagion. The total numbers of bacteria are found to be higher In dusty 4 and crowded roams, and viruses protected by dust are harder to destroy by ultraviolet and germicidal Irradiation. Methods far the control of air borne Infection Include: (1) Forced ventilation and washing of the air, which has not proved greatly efficient; (2) Ultraviolet lamps have shown good results In many cases; (3) Use of germicidal vapors has the adventage of Immediate action and less need of air change; (4) Oiling of floors and bedding provides a reduction In bacterial contamination and Is recommended I as a hygienic measure. Further study of the problem Is Indicated. Physical Measurements .1] i! (Particle 8lie--Illumination--Air Pollution, Xtc.) ill 939 Overlapping of Dust Particles on a Sampling Plate. J.O. Irvin P. Armltage, and C.W. Davies (letter to editor) Mature 163. 809. (May 21, 1949). i The overlapping of dust particles farming clumps an a glass plate for microscopical examination Is considered mathematically. 1 i i u