Abstract

The presence of sulphate-reducing bacteria in waters of the Coutts area, as indicated by chemical analyses, has been proved, and they have been shown to be absent from deep wells of the Turner Valley area. A limited number of tests indicates that they are absent from deep wells in the Wainwright area. They have been found in Idaho soils and in sewage.A procedure for proving their presence is described; pure cultures have been prepared, and some of their biochemical characteristics have been noted.The significance of the presence of these organisms in deep wells, soils and sewage is discussed, and some problems for further study are indicated.

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