Title:
This series of three historic 1934 photographs revealed some of the industrial design associated with an old municipal trickling water purif
Description:
This series of three historic 1934 photographs revealed some of the industrial design associated with an old municipal trickling water purification filtration system that at the time, was under construction in Minnesota. The technology to apply raw sewage, called 'dosing', to gravel or soil filters, was devised in the later nineteenth, and early twentieth centuries. In this series of images the three stages, top to bottom, were required in the building of these filtration beds. At the top, the cement infrastructure is created, then the structure is filled with gravel, and, finally, the liquid to be filtered is sprayed over the gravel beds.
Creator:
CDC/ Minnesota Department of Health, R.N. Barr Library; Librarians Melissa Rethlefsen and Marie Jones
Source:
Views:
914
Downloads:
7
Date Added:
November 12, 2012