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Preprinted not published, for the meeting of the Fnaineers, Pittsburgh, Pa., Xorember lön, 193i. This

American Institute of Chemical Engineers, fmsourgn, ra., u.^-wi ±his paper is the literary pro/ierty of

the Institute and is not to be reprinted in whole or abstract until after the meeting and then only with permission and with due credit. Written discussion is invited and rimv be sent to the Executive... (More)