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Show Water Hardness and Health. Hard neBS of water, that iB the a-mount a-mount of lime or other salts which it contains, appears to have a direct influence in-fluence upon the health, as the re searches of Dr. H. Roemer of Berlin bring out. Dentition is much influenced, in-fluenced, as observed in the cases of school children, and fixamining several sever-al thousand he finds that the percentage percent-age of persons having entirely sound teeth varies from 1 3 up to 20.2 per cent, according to the degree of hardness hard-ness of the water in various localities Hard water containing lime, acts favorably in this case, and magnesia appears to harden the anamel. The number of young men adapted for -militray service also increases in regions haviug hard water. As t) aotion on the blood, lime and mag nesia act by their alkaline properties to strengthen the growth of children. According to this, he states that soft water should be used for washing and cooking, and hard water for drinking purposes. Scientific American. . |