Practical Domestic Hygiene
Practical Domestic Hygiene
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In our eReader you can find the full English version of the book. Read Practical Domestic 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 Practical Domestic Hygiene
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Chalk waters undergo a certain amount of purification when the lime salts which they contain are removed by pre- cipitation for softening purposes. These efforts by precipitation of lime salts usually result in some considerable carrying down with them of organic impurities held in suspension.
Most public supplies of water are submitted to some process of filtration before distribution. This filtration is usually secured by passage of the water through beds of gravel and sand. The action of the...se filter beds is partly mechanical and partly chemical ; the former is the more important, as it is the means of holding back or removing micro-organisms intimately associated with those dis«ises spread by the agency of water. The Digitized by VjOOQ IC Purification of Water. 93 chemical action of filters upon water is probably due to the combined action of bacteria and air in the interstices of the sand.
Distillation and boiling are frequent means of purifying water ; these methods are, however, not so general for domestic purposes as filtration.
What to read after Practical Domestic Hygiene?
You can find similar books in the "Read Also" column, or choose other free books by James Lane Notter, Robert Hammill Firth to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Chalk waters undergo a certain amount of purification when the lime salts which they contain are removed by pre- cipitation for softening purposes. These efforts by precipitation of lime salts usually result in some considerable carrying down with them of organic impurities held in suspension.
Most public supplies of water are submitted to some process of filtration before distribution. This filtration is usually secured by passage of the water through beds of gravel and sand. The action of the...se filter beds is partly mechanical and partly chemical ; the former is the more important, as it is the means of holding back or removing micro-organisms intimately associated with those dis«ises spread by the agency of water. The Digitized by VjOOQ IC Purification of Water. 93 chemical action of filters upon water is probably due to the combined action of bacteria and air in the interstices of the sand.
Distillation and boiling are frequent means of purifying water ; these methods are, however, not so general for domestic purposes as filtration.
What to read after Practical Domestic Hygiene?
You can find similar books in the "Read Also" column, or choose other free books by James Lane Notter, Robert Hammill Firth to read onlineMoreLess
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