ID#: 9447
Caption:
From 1958, this historical image was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). It depicted industrial medicine in action, and was used in the U.S. Public Health Service (USPHS) publication, no. 601, entitled, “Pneumoconiosis in Diatomite Mining and Processing”, 1958. The photograph showed an Industrial Hygiene Division (IHD) investigator taking workplace air samples, in order to monitor air quality. This publication featured results of the Lompoc, California study of diatomaceous earth’s negative health effects. The substance is a non-chemical pest control, consisting of the fossilized calcific remains of free floating algae called diatoms. The naturally occurring, soft, chalk-like sedimentary rock material easily crumbles into powder, so its fine, but abrasive properties make it useful as a mechanical pesticide.
High Resolution: Click here for hi-resolution image (4.58 MB)
Content Provider(s): CDC/ Barbara Jenkins, NIOSH
Creation Date: 1958
Photo Credit: Unknown
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Copyright Restrictions: Permission is not required for public domain images, however, these images are provided by CDC and are available for personal, professional, and educational use with appropriate attribution. Redistribution must credit CDC and, where known, the individual photographer, and identify the CDC website as the free source. For additional terms see Use of Agency Materials | Other | CDC