|Description:||This historical photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). Reprinted from the May, 1951, ”Industrial Hygiene Newsletter”. The image depicted the probe attachments to be used in conjunction with an inexpensive airflow measuring device called a velometer. When fitted with probes such as these, air samples can be taken in isolated spaces (see PHIL 9489). Velometers measure concentrations of pollutants in the air.|
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.