Document 8GN7N9eZmMMyZMbVnOKd15Lm

Induetrial Hygiene Digest - SB I August, iota f I! 905 The Exploelblllty of Btarch Duat. I. Bartmaim and J.Hagy. Chem. * W. 2. 2071-2072 (July 10, 1949). Between 1901 and 1946, thirty-eight duet explosions occurred In etareh 4 and corn-products plants In this country. One proposed substitute far nitrogen trichloride far bleaching flour la potassium hrornate, vhlch in practice la premixed vlth starch. If this process la employed, It vlll greatly Increase the use of starch under conditions where explosion la possible. Oust explosions can be produced only vhen lnflaasaable dust is dispersed In air or saw other gaseous mixture but undlspersed dust oan contribute to an explosion that Is already started. Hundreds of dusts and powders hare been tested by the Bureau of Mines for exploelblllty, Including starches vlth and without potassium brornate. The teste.shoved . that the dust clouds can be Ignited by hot surfaces, weak electric sparks, and other Igniting sources, lbs presence of moisture In tbs starch de creased the eases of explosion but did not eliminate the explosion hazard. Addition of potassium bromate Increased the exploelblllty slightly. Preven tive measures recommended by the Rational Fire Protection Association In 4 clude good housekeeping, ventilation of storage places to prevent spon taneous combustion, and the use of relief vents to reduce the damage vhen l an explosion occurs. 1 906 Health Aspects of Air Pollution. AJ. lanza. Combustion 21. 5b-57 (July. 1949). t/ Si What may ve conclude from the evidence so far available? (1) Industrial fumes and gases do not occur In the general atmosphere to on extent to cause disability or death, except In very unusual and rare Instances, (2) Industrial fumes and gases may constitute a nuisance and even at times Irri tation and Inflammation of eyes and upper air passages. (3) As ve cannot control the weather, every possible means must he taken to guard against dangerous or annoying episodes. (4) Smoke pollution, aside from Its econ omic aspects, is a nuisance. It can seriously Interfere vlth general well being and comfort. That It can cause specific disease or death to any considerable degree cannot be stated In the light of avalleble evidence, (3) Every resource of engineering aclence and practice should he employed to provide an atmosphere free from annoying or dangerous Impurities. -- Author's Conclusions 9: 907 A Beport on Activities and Observations Concerning Atmospheric Pollution In the City of St. Louis" Compiled by J.J. Schueneman. Industrial Byg. Bect'ion, Division of Health, City of 6t. Louis. 10pp. (July 1, 1949). The history of atmospheric pollution control In St. Louis and the provlslons of the present ordinance are given briefly. The various surveys made by outside agencies for particular types of pollution are then summar ized. A list of twenty-five Industries about which complaints have been registered la followed by a brief description of the types of pollution from different Industries. A discussion of methods of determination, stand ards, methods of control, procedure far securing abatement, and the diffi culties encountered are Included. Ihe question must always be decided vbat Is and what Is not a nuisance, and how much of each pollutant can be allowed. Permitting too much pollution will not satisfy the public, and too high a j.