Examinations by the State Board of Health of the Water Supplies and Inland Waters of Massachusetts

Examinations by the State Board of Health of the Water Supplies and Inland Waters of Massachusetts PDF

Author: Massachusetts Dept of Public Health

Publisher: Arkose Press

Published: 2015-09-30

Total Pages: 896

ISBN-13: 9781343734920

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Examinations of the water supplies and inland waters of Massachusetts. 1887-1890. Introduction. I. Examinations of water supplies and rivers. 2. Drown, T.M. The chemical examination of waters and the interpretation of analyses. 3. Parker, G.H. Report upon the organisms, excepting the bacteria, found in the waters of the state, July, 1887, to June, 1889. 4. Stearns, F.P. Summary of water-supply statistics; also records of rainfall, flow of streams, and temperatures of air and water. 5. A classification of the drinking waters of the state. 6. Stearns, F.P., and Drown, T.M. Special topics relating to the quality of public water supplies. 7. Stearns, F.P. The pollution and self-purification of streams. Vol. 2. Experimental investigations upon the purification of sewage ... , and upon the intermittent filtration of water, Lawrence, Mass., 1888-1890

Examinations of the water supplies and inland waters of Massachusetts. 1887-1890. Introduction. I. Examinations of water supplies and rivers. 2. Drown, T.M. The chemical examination of waters and the interpretation of analyses. 3. Parker, G.H. Report upon the organisms, excepting the bacteria, found in the waters of the state, July, 1887, to June, 1889. 4. Stearns, F.P. Summary of water-supply statistics; also records of rainfall, flow of streams, and temperatures of air and water. 5. A classification of the drinking waters of the state. 6. Stearns, F.P., and Drown, T.M. Special topics relating to the quality of public water supplies. 7. Stearns, F.P. The pollution and self-purification of streams. Vol. 2. Experimental investigations upon the purification of sewage ... , and upon the intermittent filtration of water, Lawrence, Mass., 1888-1890 PDF

Author: Massachusetts. State Board of Health

Publisher:

Published: 1890

Total Pages: 894

ISBN-13:

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Examinations by the State Board of Health of the Water Supplies and Inland Waters of Massachusetts, 1887-1890

Examinations by the State Board of Health of the Water Supplies and Inland Waters of Massachusetts, 1887-1890 PDF

Author: Massachusetts. Dept. Of Health

Publisher: Rarebooksclub.com

Published: 2013-09

Total Pages: 168

ISBN-13: 9781230141244

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 edition. Excerpt: ...are evaporated to 25 c.c. and the titration made in the same dish. To guard against loss of chlorine in the evaporation, a small quantity, say 20 milligrams, of sodium carbonate may be added to the water; this amount does not interfere with the accuracy of the titration. Before the titration is made, the sides of the dish above the liquid must be washed down with distilled water free from chlorine, and rubbed with a feather or rubber; washing alone will not dissolve all the chlorides which adhere to the sides of the dish. When the amount of chlorine is very low, a known amount of salt added to the liquid facilitates the titration by making more definite the determination of the end point. Brown surface waters must be decolorized before titration. This is conveniently done by adding a small amount of aluminum hydrate to the water, or by adding a solution of alum and then sodium carbonate, filtering off the precipitate, or decanting the clear fluid after the alumina has settled. If the water is brought nearly to boiling with the alumina, the latter will settle more promptly. The volume of liquid in which the chlorine is determined has an effect on the amount of silver solution used in the titration--the larger the volume, the greater the amount of silver used for the same amount of chlorine present. This has been studied by Mr. Allen Hazen of the Lawrence Experiment Station, and the reader is referred for a statement of his results to the second volume of this report." The Determination Of Toe Residue Of Evaporation And Loss On Ignition. The evaporation to dryness on a water bath of a known volume of water in a weighed platinum dish, and subsequently heating the dish to a temperature of 100 C. in an air bath, gives the total weight of...

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