United States Public Health Service (USPHS) scientific investigators, working in their makeshift laboratory onsite in Connecticut, during the 1937-1938 PHS industrial hygiene and engineering study of mercury exposure, and its health effects in the hatmaking industry. The study was published in the USPHS Public Health Bulletin, No. 263, Mercurialism and its Control in the Felt-Hat Industry, 1941. Its abstract states that “quantitative chemical analysis of the mercury content of air, fur, tank water, etc., and for the quantitative spectrographic analysis of mercury in urine”, were conducted. The scientists seemed to be enjoying a light moment amid the challenges of their work.
The NIOSH Historic Photo Collection began as the picture file of the Industrial Hygiene Division of the U.S. Public Health Service (USPHS), c. 1930-1960. It is a unique collection of mid-20th Century images of American workers and workplaces and documents occupational safety and health research of that era. The collection consists of approximately 1,000 original photographs and schematic drawings.