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September 25, 1909

Purification of Water by Ozone

JAMA. 1909;LIII(13):1042. doi:10.1001/jama.1909.02550130058011

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To the Editor:  —An interesting editorial on the purification of water by ozone appears in The Journal, August 21. In the closing paragraph appears the following:"To justify the introduction of any new system of water purification, even though it be one of recognized efficiency, the question of comparative cost should be presented in such a way as to convince reasonable inquirers. This has not yet been done with the ozonization process."May I be permitted to draw your attention to the fact that in America data are available covering the comparative costs of ozonization and sand infiltration. The Murphy Cold Storage & lee Company of Detroit have for over two years been sterilizing water by ozone, and they have found that it cost 4 cents for electric energy for 50 tons of water sterilized.At Lindsay, Ontario, an ozone purification plant has been in operation since last October purifying

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