A photographic print of a liquid chlorine apparatus used for water sterilization, courtesy of the Electro-Bleaching Gas Company.

From Water Purification Plants and Their Operation, a volume primarily intended for…

An aerial illustration of a slow sand water filtering plant with cutouts to depict underground activity.

From Water Purification Plants and Their Operation, a volume primarily intended for non-technical operators of…

Primarily intended for a non-technical operator of small plants, and particularly of one where chemicals are used, Water Purification Plants and Their Operation provides a concise overview of the operation of…

Created by Eli Lilly & Company, this handbook is meant for pharmacists. It is a list of products and contains practical information such as concentration and dosing. In the appendix there are botanical synonyms,…

Cover and illustrated color plates from the 3rd edition of The microscopy of drinking water by George Chandler Whipple. Per the author, the book is designed to serve as a guide for the water analyst and water-works…

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 employee using a Perkin-Elmer fluorescence spectrophotometer in a mobile laboratory for the Environmental Protection Agency's Oil and Hazardous Materials Spills branch. Per notations…

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…

Electric-powered meter with instructions housed in wooden box. Movable components within box: two (2) slide glass filters (1 with red, green, and blue slides; 1 with orange, green, and blue slides); one (1) encasing to…

Plastic tube with purple flip cap. Hollow fibers inside tube filters contaminants from water. Purple string attached to one end of tube.

LifeStraw is a personal and mobile water purification tool developed as a…

A: Bulb containing mercury attached to a glass tube of narrow diameter. Thermometer has Celsius scale with 20-30 degree range with major divisions every 1 degree and minor divisions every 0.1 degree.

B: Protective…

A: Bulb containing mercury attached to a glass tube of narrow diameter. Thermometer has Celsius scale with 0-100 degree range.

B: Protective cardboard tube for the thermometer (not digitized).

Partial immersion…

A: Blue plastic funnel with B: cap used to hold filter paper. Funnel is designed to fit on two 2-liter soda bottles (with cap on) or on the top of a jerrycan (without cap).

In 2016 Dr. Theresa Dankovish's company,…

Advertisement for thanite DDT insecticide spray depicts a fly killed by the effects of the spray.

Formed in 1912 as part of an anti-trust settlement with DuPont, the Hercules Powder Company (later Hercules Inc.)…

Transparency copy of a print advertisement for Dursban, an insecticide marketed and sold by the Dow Chemical Company for use against mosquitoes. The advertisement features an illustration of several snowy egrets in a…

Self contained pH meter with wooden exterior; hinged lid opens to reveal meter face and inlaid paper instructions for use; the dial is calibrated from pH 0 to pH 13 in .1 pH divisions; porcelain enamel lined electrode…

Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up doing such diverse jobs as monitoring astronauts’ respiration, maintaining packaged food safety,…

Color print magazine advertisement for Black Flag's Aerosol Insect Killer.

Cardboard box with color printing on lid, showing young men and women engaged in chemical testing of environmental factors (air, water). Inside is a blue plastic tray with wells for test equipment, including a…