Sanitary examinations of water, air, and food - Softcover
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1886 Excerpt: ... great manufactories that defile the air exist, which sustain in their vicinity hundreds and thousands of work-people, whose vital energies are lowered (thus rendering them a more ready prey to disease), and whose offspring are stunted and depraved by the medium which the industry that supports them is always and needlessly rendering unwholesome. A. Organic Matter. organic Organic matter which is given off from the skins and lungs of all animals, and gives that peculiar, indescribable and sulphur compounds. This plan is perfectly useless, for the amounts of these bodies secured in this way are too small for estimation. odour noticeable in ill-ventilated bedrooms occupied by many or by dirty people, is very easily detected in the air, but there has always been a considerable difficulty in estimating its amount, by reason of the interference of other substances contained in air, which is a mixture of so many different extraneous bodies. Of the chemical composition of organic emanations we know very little. Dr. Odling found that the vapours arising from sewage were of a carbo-ammoniacal nature, similar to such bodies as methylamine, or trimethylamine and ethylamine. Beyond this point there is nothing but a terra incognita as to this very interesting subject. One of the first processes adopted for the estimation Permanganof the amount of organic matter was to expose a solution Method! of permanganate of potash to the air, as the oyxgen of the salt has a powerful oxidizing effect on organic matters. A burette was filled with a very weak solution, and an attempt was then made to ascertain how much of it was necessary to drop into a bottle of a certain capacity, before it arrived at the point when it was no longer cfccolorized by the air of the bottle. The amount ...
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- PublisherRareBooksClub.com
- Publication date2012
- ISBN 10 1130137899
- ISBN 13 9781130137897
- BindingPaperback
- Number of pages82
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