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From the National Institute of Health, Division of Infectious Diseases, Dr. R. E. Dyer, Chief; with the coöperation of the DeLamar Institute of Public Health, Columbia University, New York, N. Y., and the following health departments or agencies. New Mexico State and Bernalillo County; Georgia State and Dougherty County; New York City (Divisions of Preventable Diseases and Laboratories); New York State, through the District Office at Middletown; and the Indian Medical Service.
†
Read at a Joint Session of the Laboratory and Epidemiology Sections of the American Public Health Association at the Sixty-eighth Annual Meeting in Pittsburgh, Pa., October 17, 1939.