ID#: 9448
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 included in the U.S. Public Health Service (USPHS) publication, no. 601, entitled, “Pneumoconiosis in Diatomite Mining and Processing”, 1958. The photo showed Industrial Hygiene Division (IHD) investigators using air-sampling devices to monitor air quality in the workplace. 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
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.