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Author notes

A. H. Robertson is a graduate of the College of Agriculture at Cornell University. Since 1930 he has been Director of the State Food Laboratory, of the Department of Agriculture and Markets, Albany, New York.

Mr. Robertson served from 1943 to 1953 as Chairman of the Committee for editing the Ninth and Tenth Editions of Standard Methods for the Examination of Dairy Products, published by the American Public Health Association. He also aided in editing the Eighth Edition of Official Methods of Analysis of the Association of Official Agricultural Chemists, and is a member of several committees of that Association.

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