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Author notes

1Presented at the Annual Meeting of the International Association of Milk and Food Sanitarians, Inc., Atlantic City, New Jersey, October 21–23, 1954.

Mr. P. W. Purdom received the B.S. degree in Civil Engineering from the Georgia Institute of Technology in 1937 and the M.S. degree in Sanitary Engineering from the University of Michigan in 1951. Mr. Purdom has had wide experience in public health work serving with the U. S. Public Health Service, the Knoxville Bureau of Health, the Georgia Department of Public Health, and the Tennessee Department of Public Health. He has been active in several professional societies and committees. His current position is Director of the Division of Air Pollution Control and Environmental Sanitation, Philadelphia Department of Public Health.

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