This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...in the lake appeared to have a comparatively uniform chlorine content. A study of old analyses which have been made at various points in Lake Erie from time to time during the last 40 years indicate that it was not until after 188o that the amount of chlorine in the water of Lake Erie began to show a decided increase, ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...in the lake appeared to have a comparatively uniform chlorine content. A study of old analyses which have been made at various points in Lake Erie from time to time during the last 40 years indicate that it was not until after 188o that the amount of chlorine in the water of Lake Erie began to show a decided increase, and the time when the increase became marked was approximately the beginning of the oil industry. It is possible that the development of the salt industry may also contribute to this increase in chlorine, but from the best available evidence this is probably much less than that from the oil wells. The object of this general study of the lake water was to determine whether the increase in chlorine in the water supply of Cleveland was due to local pollution or to conditions which affect the entire body of the lake. GENERAL POLLUTION OF LAKE ERIE. The total population on the Great Lakes above Lake Erie is about 5,800,000, of which about 3,300,000 may be considered as urban and 2,500,000 as rural. The drainage area is about 178,250 square miles. This gives the urban population per square mile at 19, the rural population at 14. and the total population as 33 per square mile. On the'drainage area of Lake Erie the total population is about 2,100,000, of which about 1,200,000 are urban and 900,000 rural. The drainage area is 24,480 square miles, hence the urban population per square mile is 49, the rural population 37, and the total population KIi per square mile. On account of the immense storage of the Lakes these figures are of very little practical significance, but they serve to show the density of the population on the watersheds draining into the lake. All the evidence at hand tends to show that the sanitary quality of the lake water taken as a...
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