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September 13, 1890


JAMA. 1890;XV(11):396-398. doi:10.1001/jama.1890.02410370020002

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Disinfecting Power of Peroxide of Hydrogen (H2O2).  Dr. Altehofer of Rostock, gives us, in the Cent. f. Bakteriologie und Parasitenkunde, a careful study of the disinfecting power of this substance, for which he claims the especial merit that it does not alter the appearance, taste or smell of water to which it has been added.The first experiments were made with spring water, the second with hydrant water and a third with river water. The first contained 560, the second 180, and the third 1800 germs in each cubic centimetre. To these several waters were added H2O2 in the proportion of 1:5000 and 1:10000, and after an exposure of 24 hours inoculations of gelatine and agar-agar were made. In each case abundant colonies developed, but those from the weaker solution were in greater number and more vigorous.A second series was made upon hydrant water to which sewage had been

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