. McClure's magazine. Ordinary Filtersare Dangerous. Professor Lucius Pitkins, Ph. D., Analytical Chemist of New York, says:A filter is essentially a sieve, and the organisms which it must stop intheir passage are, to put an average figure, but one twenty-five thousandthof an inch in diameter. Filters Packed with sponge, charcoal and gravelcatch only the coarser particles of floating matter, and are no better than aflannel bag tied to a faucet. These filters pollute the water if not keptscrupulously clean; the impurities collected decompose and become moredangerous than in their original state
. McClure's magazine. Ordinary Filtersare Dangerous. Professor Lucius Pitkins, Ph. D., Analytical Chemist of New York, says:A filter is essentially a sieve, and the organisms which it must stop intheir passage are, to put an average figure, but one twenty-five thousandthof an inch in diameter. Filters Packed with sponge, charcoal and gravelcatch only the coarser particles of floating matter, and are no better than aflannel bag tied to a faucet. These filters pollute the water if not keptscrupulously clean; the impurities collected decompose and become moredangerous than in their original state. a. fl_ ._ The GERMPROOF. in theworld has a filtering medium of unglazed porcelain and the impurities are collect-ed on the outside surface andcau readily be removed with brush and Department, Office Supt op Health, Biological >Laboratory, City Hall, , R. I. ) Sirs—A single tube domestic Pasteur Filter, submitted to me forbiological examination, has been upon the faucet in the laboratory forupwards of a year, during which time daily and weekly analyses have beenmade, the results invariably showing a complete filtration of all organismsfrom the water supplied. This is the only filter which I have thus far fouudupon the market which did not increase the number of organisms presentwithin twenty-four hours use. Yours respectfully, GARDNER T. SWARTS, M. D., Medical Inspector. The Pastea^Chamberland F^ter Go. Dayton, 0. EASTERN DEPARTMENT, 1193 BROADWAY, N. Y. Sales Agencies: Baltimore, 801 N. Howd , 180 Washington , 251—257 Main , 205 State ,
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Keywords: ., bookcentury1800, bookdecade1890, bookidmccluresmaga, bookyear1893
