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Excerpt from Marketing Activities, Vol. 10: August, 1947 The test depends on the fact that all normal raw milk contains a phosphatase enzyme which is destroyed by heating at a temperature a few degrees higher than that required to destroy the most resistant of the pathogenic or disease-producing organisms that may occur in milk. The test is so sensitive that it will detect the presence of 1 pound of raw milk in pounds of properly pasteurized milk, or of 1 pound of raw cream in pounds of pasteurized cream. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.