Abstract

Of the various topics in this branch of sanitation there is none which has received so much discussion during the past year as that of the proposed use of copper sulphate. This chemical has been proposed for various purposes, the chief of which are as follows: 1. As an algicide; 2, as a germicide for infected water supplies used without subsequent filtration for drinking; 3, as a germicide for the effluent of coarse-grained sewage filters prior to entering drinking water streams; 4, as a germicide in conjunction with a coagulant in the filtration of highly polluted streams. COPPER SULPHATE AS A GERMICIDE. Although copper sulphate as a germicide and disinfectant has been studied from time to time for many years, especially in Germany during and after the severe outbreak of cholera in 1892, this question has recently pressed forward for attention, largely due to the very interesting bulletin prepared by

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