... household equipment that is of interest to women must be used as a water container, the effect of water of varying degrees of hardness upon the several metals is of interest. Most metals have some electrolytic action. There are throughout the country water supplies of every known degree of hardness. There are water supplies whose hardness can be corrected and there are supplies of the type known as "permanent" hardness. In actual practice the salts in these ... — The Consumer Viewpoint • Mildred Maddocks
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