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The focus of the images, and the training effort was to promote sound practices involved in protecting potable water supplies from bacterial contamination. The descriptive information accompanying this image referred to a governmental publication outlining the operating instructions for this device. The specific citation was: “Whittaker, H.A.; Hypochlorite treatment of water supplies; portable plant and field equipment for its administration Public health reports, 30:608-18, 1915.
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