Document meYE7BwyamjOXg41Xnk8169O

ji Industrial Hygiene Digrat ) _ _________ March, *V1 halogens, oaone, and tuWur compound*. l-u;*d corroded so rapidly as to I.*? difficult to intur. -- pret while Iron wii shown to bo responsive primarily to relative humidity. Fair correlations ] were obtained with independent maaiurut of pollution level. Somu exploratory work wii done en the measurement o/ the electrical resistance of the fiime. Author#' abet. 293 "Invisible Injury0 of Buh Beane by Atmospheric and Aqueous Fluoride*. H. G. Applegate end 0. T, Adame. Intern. J. Air Poll." 231-248 (Oct. 19801. Bush been*, j^haseolus vulgaris var, humills, when euhjuctcd to either gaseous fluo ride or solutions containing fluoriJoThave abnormal oxygen uptake when compared with elmtlar plante not subjected to fluoride. Plante given gaseous fluoride for 24 hour* prior to harvest consistently had greeter oxygen uptake than their control counterparts. Plants given continuous fluoride from time of germination had. with ths exception of a short period around the fifth day, greater oxygen uptake than their control plants. Between the fourth and sixth days, continuously fumigated plants had a lower oxygen uptoke than the unfumlgated control plants. There appeared to be little difference in respirotion patterns between gaseous fluoride-mediated respiration and aqueous fluoride-mediated respiration. This physiological disturbance induced by fluoride which has been demonstrated is considered to be ar, example of "invisible injury", by classical de finition. - - Authors' abst. 294 The Influence of Smeltc^ Fumes Upon the Chemical Composition of Lake Waters Near Sudbury. OntarioT and Upon the SurroundingJ^e^clMlon, E. Gorham and A, G. Gordon. Can.J. Botany 36, 477.467 (July 1900). Analyses for sulfate, calcium, and pH have been made on surface waters from 102 lakes and ponds In the Sudbury metal-smelting district, and data are presented for 35 of these. Sulfur pollution Is frequently high within S mile* of the 3 smeUora, many ponds exhibiting more than 3 times the sulfate concentration normal for this area, and 3 waters more then 10 tlmee this level. Outside about IS miles distance the influence of smelter pollution upon sulfate con centrations in surface waters is negligible. As expected, many of the most polluted waters are strongly acid, with pH values going as low as 3,3. Sulfuric acid from air pollution has also led to increased weathering of calcium from toils and rocke, to that this ion tends to rise in con centration not only in waters above pH 6 but also in those bolow pH 5, Damage to terrestrial **fettion is frequently marked within b miles of the smelters, while it is seldom obvious to th untrained eye beyond this distance. Severe damage oecure chiefly within about 2 miles of Ihe smelters. - - Public Health Eng, Abet*. *; t:' L- P W A,I W ^3 Why Industry Need* Performance Standard Zoning. Dorothy A. Muncy, 2. Air Poll. Control Aesn. H> 282-264 (Aug, I960), Zoning controls are required to guide the development of open land In the suburbs which still lack the protection of an air pollutign agency. The use of performance standards In a coning ordinance fa a necessary measure m protect vacant land for future industry. Eight trends in Industrial land use are significant tv the prevention of air pollution and to the pro- clion of land for future industry} 4 of thv*u trcrul result directly from industrial manage ment decisions and should guarantee the cunip,rrtbllity of future plants. The next 3 trends in suburban growth could handicap industry's uf,,rls to improve its location. Tho 8th trend in suburban growth iltuetratei the critical nm-d f.ir performance standards in land use toning. These trends are discusead*In~detl);~~!*">d4r<ls formulated now to guide new industrial growth can be a major preventive measure, until ihu time when the whole region 1# protected by a full- scale air control agency. * - APCA Abate. : f. g % i? I M f4 *r.; 7 ir V^- IS. ......**