The Examination of Waters And Water Supplies
The Examination of Waters And Water Supplies
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In our eReader you can find the full English version of the book. Read The Examination of Waters And Water Supplies Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Examination of Waters And Water Supplies
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The amount of soap destroyed by 1 mlgr. Of that salt is not exactly one-tenth of that destroyed by 10 mlgr. ; hence tables have been con- structed which pretend to show the amount of calcium carbon- ate equivalent to the soap solution used. What good purpose is served by such a table I have never been able to divine. The unit above suggested and generally adopted has a definite meaning and practical use. A water of 8 hardness will waste twice as much soap as one of 4, and only half as much as o...ne of 16, &c. Beyond this it means nothing definite, but it gives a rough idea of the amount of calcium and magnesium salts present, and this rough approximation is very often quite suffi- cient for the purpose of the analyst. If it is not, it is far more satisfactory to determine the amount of these salts by the methods proper for their estimation than to attempt to calculate it from the results of the soap test.
The hardness left after boiling may or may not be entirely due to sulphates and chlorides.
What to read after The Examination of Waters And Water Supplies?
You can find similar books in the "Read Also" column, or choose other free books by John Clough Thresh to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The amount of soap destroyed by 1 mlgr. Of that salt is not exactly one-tenth of that destroyed by 10 mlgr. ; hence tables have been con- structed which pretend to show the amount of calcium carbon- ate equivalent to the soap solution used. What good purpose is served by such a table I have never been able to divine. The unit above suggested and generally adopted has a definite meaning and practical use. A water of 8 hardness will waste twice as much soap as one of 4, and only half as much as o...ne of 16, &c. Beyond this it means nothing definite, but it gives a rough idea of the amount of calcium and magnesium salts present, and this rough approximation is very often quite suffi- cient for the purpose of the analyst. If it is not, it is far more satisfactory to determine the amount of these salts by the methods proper for their estimation than to attempt to calculate it from the results of the soap test.
The hardness left after boiling may or may not be entirely due to sulphates and chlorides.
What to read after The Examination of Waters And Water Supplies?
You can find similar books in the "Read Also" column, or choose other free books by John Clough Thresh to read onlineMoreLess
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