Household Hygiene
Household Hygiene
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In our eReader you can find the full English version of the book. Read Household Hygiene 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 Household Hygiene
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Freshly decayed nitrogenous materials produce ammonia. After fur- ther bacterial and chemical action the ammonia is changed into nitrites and finally into nitrates. By testing for these products the amount of pollution, if any, and the time since it happened, may be usually determined.
Another test is for common salt. Water polluted by house drainage contains, although a very small amount, yet more salt than ordinary water. In all cases the source of the water and the ordinary composition of un...polluted water in about the same locality, must be known. This, combined with the bacteriological tests, which should reveal the pres- ence and kind of germs, gives the trained analyst a good idea of the purity of the water. There are not many tests which are at all reliable in the hands of an amateur. The sense of taste and of smell are the chief tests which the housewife can apply for water. To find the odor of the water, a large bottle, two quarts or a gallon, may be two- thirds filled with the water, tightly corked and placed in a warm room.
What to read after Household Hygiene?
You can find similar books in the "Read Also" column, or choose other free books by S Maria Sophronia Maria Elliott to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Freshly decayed nitrogenous materials produce ammonia. After fur- ther bacterial and chemical action the ammonia is changed into nitrites and finally into nitrates. By testing for these products the amount of pollution, if any, and the time since it happened, may be usually determined.
Another test is for common salt. Water polluted by house drainage contains, although a very small amount, yet more salt than ordinary water. In all cases the source of the water and the ordinary composition of un...polluted water in about the same locality, must be known. This, combined with the bacteriological tests, which should reveal the pres- ence and kind of germs, gives the trained analyst a good idea of the purity of the water. There are not many tests which are at all reliable in the hands of an amateur. The sense of taste and of smell are the chief tests which the housewife can apply for water. To find the odor of the water, a large bottle, two quarts or a gallon, may be two- thirds filled with the water, tightly corked and placed in a warm room.
What to read after Household Hygiene?
You can find similar books in the "Read Also" column, or choose other free books by S Maria Sophronia Maria Elliott to read onlineMoreLess
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