THE CHEMICAL WORLD THIS WEEK p r o s e d the hope that the AC'S would be . >n its guard against any change that might restrict the national scope a n d appeal of the Society. Although t h e r e is little danger on this score so far as geography is co7"-enied, Dr. L a m b felt that there was some possibility that m e m b e r ship requirements might b e so stringent that onl> the higher strata or elite ol i heim'sts would be admitted. This would be a catastrophe and would u n d e r m i n e the \ er> foundations on which the Society lias been built. L a m b declared. lie said the Society must be exceed;iigl> circumspect about any further increase in the journals it now publishes. "*YVe should start a new journal only w h e n a new field ol chemistry is opened u p in which a great number of chemists are interested, M) that a large circulation can be assured which is not merely a transfer .»t subscribers from our old journal to the new one." he said. "There is no question in my mind that, -o lar as the progress of chemistry and the welfare of the whole scientific community are concerned, a combined journal, such a». for instance. ./.ACS. secures more extensi\e and of fluorine that is released when the phosphate rock i s treated with sulfuric acid. In their operations Davison uses a waterspray scrubbing tower, a Schutte & Koerting fume scrubber, and a water-spray hori/onta! scruhhor. which jn've apparent efficiences of 9 5 . 98, and 99' r, respectively, he finds. In each case he gave data for the operating pressures and water requirements. In a p a p e r on the economics of fly ash collection. C A. Callaer of Buell Engineering Co. also stressed the individuality of each case. But with all the variables, he was a b l e to d r a w some generalities helpful to t h e engineer saddled with the problem of controlling fly ash. Efficiency requirements, he said, are the first considerations. Once they have been determined, either by law or other considerations, the effluent gases must be analyzed for quantity and particle size. l i e recommended various types of collectors for certain applications, made some estimates on initial a n d operational costs of each type, and presented graphs correlating the man}" factors. In general, he said, the cost differential increases with the finer pulverization of the fuel. In either case, the cost will rise very rapidly as efficiency approaches 100'v, h e concluded. An 8'>
