|Description:||This 1949 historical photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). Reprinted from the August, 1949, ”Industrial Hygiene Newsletter”, it depicted a Mine Safety Appliances Company (MSA), Davis Micro Gas Analyzer™, a machine used to monitor indoor/outdoor air contamination.|
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.