General view of a Perkin-Elmer Model 337 Grating Infrared Spectrophotometer in use at a Calgon Water Management laboratory facility. The female technician visible in the photograph is unidentified.

General view of a Perkin-Elmer Grating Infrared Spectrophotometer in use at a Calgon Water Management laboratory facility. Per notations accompanying the photograph, the spectrophotometer is being used to characterize…

General view of an unidentified chemist operating a Perkin-Elmer gas chromatograph in an Environmental Protection Agency (EPA) Region II laboratory located in Edison, New Jersey. Per notations accompanying the…

General view of an unidentified female employee pouring a water sample into the tray of a Perkin-Elmer Autosampler at an Environmental Protection Agency (EPA) laboratory facility located in Edison, New Jersey. Per…

General view of an unidentified employee operating a Perkin-Elmer Atomic Absorption Spectrophotometer with a heated graphite atomizer (HGA) attachment in use at a Calgon Water Management laboratory facility. Per…

General view of a Perkin-Elmer Atomic Absorption Spectrophotometer in use at a Calgon Water Management laboratory facility. Per notations accompanying the photograph, the spectrophotometer is equipped with a…

General view of Wilson Walker, Chief Chemist at the Ohio Department of Health's Sanitary Chemistry Laboratory, injecting a sample of drinking water into the cylinder of a Perkin-Elmer Heated Graphite Atomizer (HGA). Per…

General view of employee Jack Guillaumin (right) and an unidentified chemist reviewing the results of an analysis conducted by a Perkin-Elmer Model 306 Atomic Absorption Spectrophotometer in a laboratory at the Detroit…

General view of laboratory technician Richard Thomson preparing water samples for testing at the New York City Bureau of Water Supply's Ben Nesin Laboratory. Per notations accompanying the photograph, a Perkin-Elmer…