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Analyzing Sewage Water in Laboratory, 1942

Arlington County Laboratory and workers, 1940

Arlington County Laboratory interior, 1940

Arlington County Laboratory, 1940

County bacteriologist, 1941

County Health Laboratory, 1942

County Staff in Laboratory, 1942

Dark Field Examination, 1943

Dissection of Dog Head, 1943

Laboratory Workers Performing Blood Tests, 1943

Laboratory Workers, 1943

Laboratory workers, 1958

Public Health Laboratories, 1958

Using the New Colony Counter in Laboratory, 1942

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