|Description:||This 1949 historical photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). This image depicted a copy of an advertisement for the Mine Safety Appliances (MSA) Company’s, Combustible Gas Indicator™, a portable instrument for detecting and measuring the presence of combustible gases in workplace environments. On the left side of the instrument (right side in the product photograph), the bulb of a hydrogen cyanide detector was visible.|
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.