This historic diagram, which had been digitally enhanced and colorized, depicted one method of sewage disposal recommended for farm homes. The illustration showed the details of a pipe-grid distribution system. Published in 1914, this was one of a series of instructional drawings used by the Minnesota Board of Health to train the state's public health workers.
CDC/ Minnesota Department of Health, R.N. Barr Library; Librarians Melissa Rethlefsen and Marie Jones
December 4, 2012
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