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NEWS
firms, and others for the support of the work of the committee, the establishment of research fellowships, and such other activities as will advance and expedite the achievement of the results sought. Such a survey is being conducted to ascertain what investigations are under way or planned for the synthesis of new and useful antimalarials, to compile a list of individuals and firms interested in thisfield,just what they are doing and (so far as may be possible) in what other directions they are arranging to expand. Simultaneously, bibliographies, reviews, and digests of the literature covering various aspects of the problem are being compiled, but all this work can progress but slowly under existing limitations, and speed is urgently needed, for the medical profession confidently predicts a malaria peak this year or next. Those individuals, organizations, institutions, and manufacturers, who are willing to cooperate in what we are endeavoring to accomplish by supplying
EDITION
the information suggested, are requested to communicate with the chairman of the committee, whose address until September 20, 1940, will be Belgrade Lakes, Maine; after that, Havemeyer Hall, Columbia University, New York, N. Y. As this committee has been for some time in touch with many others interested in antimalarials, both in this and in other countries, and has accumulated considerable information of value, it seems wise to publish the above statement in order that confusion and duplication of effort be avoided and national preparedness advanced more speedily. We have been informed that other committees and groups have been or are about to be organized to cover much the samefield,evidently unaware of the existence of our committee and its activities. LOWELL T. COGGESHALL LEONARD H. CRETCHER LYNDON F. SMALL TORALD H. SOLLMANN MARSTON T. BOGERT, Chairman
Power, Capacity, and Efficiency of Pumps W. F. Sduphont 45 Academy St, Newark, N. J. T H E accompanying chart will be useful for finding the horsepower necessary to do almost any pumping job up to 100 h. p., for finding the gallons of water a given pump will lift per minute, for finding head, or for finding the efficiency of a given installation. Example: Tofindthe gallons per minute that will be pumped by a 40-h. p. motor through a 40-foot head, friction head included, efficiency of the pump being 50 per cent, join the 40 (column A) with the 50 per cent (column E) and locate the intersection with column C. Run a straight line through that intersection (column C) and the 40-foot head (column D) and the answer (1950 gallons per minute) is found in column B. The principal point to remember is that A and E should always be connected; also B and D. The two outside columns must be used together, and B and D together. Knowing three of the values in A, B, D, or E, the fourth is easily found. Whether motive power is electric, steam, gas, oil, belt, or water makes no difference, nor does the pump, whether duplex, triplex, reciprocating steam, centrifugal, or air lift. When figuring efficiencies a general rule is to allow about 80 per cent for duplex, triplex, and reciprocating pumps in general; for a good modern centrifugal pump, about 60 per cent; and for air lift pumps, 40 per cent. Neglecting friction head and using the actual pumping head in column D the efficiency (column E) then becomes the over-all efficiency of the installation. The over-all efficiency, of course, is always less
than the pump efficiency, the difference depending on friction.
Vol. 18, No. 15 Advance Registration for Detroit Employment Clearing Home I T HAS been decided to accept advance registration for the Detroit Employment Clearing House. The vitaefiledby mail will be checked and classified in Washington, thus relieving congestion at the time of the meeting. However, these records will not be cleared for employers until after the arrival of the registrants, since all users are assured that everyone whose vita is on file is available for interview. It is hoped that those planning to register in the Detroit Clearing House will write to the AMERICAN CHEMICAL SOCIETY,
Mills Building, Washington, D. C., in the near future, requesting the proper forms. Bear in mind that the Employment Clearing House is open only to members and paid student affiliates of the AMERICAN CHEMICAL SOCIETY present at the meeting
and so available on short notice for interview. For further details concerning this activity, see page 511 of the NEWS EDITION for June 10. C. D. Thayer has resigned his position as assistant chief chemist, United Refining Co., Warren, Penna., and entered the employ of United Cooperatives, Inc., as chief chemist in charge of the Indianapolis laboratory.
