Abstract
One phase of the work of Standardization Council Committee No. 1 (Standard Methods of Water Analysis) has enlisted the cooperation of a large group of workers over the country, and has reached the stage that a definite statement of the progress made to date should be available for general study and criticism. This work has been done under the supervision of Jack J. Hinman, Chairman of the Committee, with sub-topics directed by the authors. The study is based upon what appears to be a need for revision of the present standard A. P. H. A. method for determining the presence of the colon group of lactose fermenting aerobes.
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