Self-Purification of Flowing Water and the Influence of Polluted Water in the Causation of Disease: A Biological Study (Classic Reprint) - Softcover

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Excerpt from Self-Purification of Flowing Water and the Influence of Polluted Water in the Causation of Disease: A Biological Study

This number was above that of the average of Western Lakes. Thus, Union Lake, upon which Seattle verges, averaged in the middle of its surface (june, 1890) only 13 germs per out of three analyses which I made of its waters.32 currier ON self - purification or flowing water.

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