|Description:||This historic diagram, which had been digitally enhanced and colorized, depicted a 1910 portable emergency hypochlorite water purification device used by the Minnesota State Board of Health, Division of Sanitation. This was one of a series of instructional drawings used by the Minnesota Board of Health to train the state's public health workers.|
The purpose of this and other like images, and the training was focused on protecting water supplies from bacterial contamination. The descriptive information accompanying this drawing referred to a governmental publication with instructions describing the correct placement and build-out of such a system. 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”.