Rural Water Supplies And Their Purification
Rural Water Supplies And Their Purification
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, except that the B. Coli results were based on confirmatory evidence, and questions of hardness and colour were not again considered, TABLE XV. COMPARE WITH TABLE XII. RIVER-WATER. HYDRATE OF LIME (CaO, H 2 O) 9 GRAINS PER 80 OZ. (= l8 GRAINS PER GALLON. ) Experi- ment Smallest amount of water (in c. C. ) yielding a positive B. Coli result, before addition of lime Same as Col. 2, but after twelve hours' lime treatment Actual excess of caustic lime (CaO) in the water in grains per gallon Cols, ...i 2 3 4 I ... -f- O'l C. C.
100 C. C.
I '4 2.
... +0-1 ...
II 2'8 3 ... + O'OI kl j> The results show clearly that a dose sufficient to leave less than 3 grains of excess lime (CaO) in the treated water is more than enough for sterilization purposes.
Speaking generally, the assumption that the good results obtained in Series I. , II. , and III. Would have been better still if confirmatory B. Coli tests had been applied is completely borne out by the results set forth in Series IV. (I. , II. , and III.
What to read after Rural Water Supplies And Their Purification?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Cruikshank Houston to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
, except that the B. Coli results were based on confirmatory evidence, and questions of hardness and colour were not again considered, TABLE XV. COMPARE WITH TABLE XII. RIVER-WATER. HYDRATE OF LIME (CaO, H 2 O) 9 GRAINS PER 80 OZ. (= l8 GRAINS PER GALLON. ) Experi- ment Smallest amount of water (in c. C. ) yielding a positive B. Coli result, before addition of lime Same as Col. 2, but after twelve hours' lime treatment Actual excess of caustic lime (CaO) in the water in grains per gallon Cols, ...i 2 3 4 I ... -f- O'l C. C.
100 C. C.
I '4 2.
... +0-1 ...
II 2'8 3 ... + O'OI kl j> The results show clearly that a dose sufficient to leave less than 3 grains of excess lime (CaO) in the treated water is more than enough for sterilization purposes.
Speaking generally, the assumption that the good results obtained in Series I. , II. , and III. Would have been better still if confirmatory B. Coli tests had been applied is completely borne out by the results set forth in Series IV. (I. , II. , and III.
What to read after Rural Water Supplies And Their Purification?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Cruikshank Houston to read onlineMoreLess
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