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Subject Water--Purification Remove constraint Subject: Water--Purification

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    • 2007

    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…

    • Keystone funnel
    • 2016

    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,…

    • 1950s

    This advertisement highlights uses for Models R, H, and M pH meters in the water and wastewater treatment industry.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California…

    • 1958

    Cachet and stamp depict Claude-Louis Berthollet. Cachet includes text describing Berthollet's contributions to water purification.