Chemistry in Daily Life Popular Lectures
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In our eReader you can find the full English version of the book. Read Chemistry in Daily Life Popular Lectures 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 Chemistry in Daily Life Popular Lectures
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The details of the various processes 154 CHEMISTRY IN DAILY LIFE.
differ much, but the method is essentially a tannage by fat and alum. Speaking generally, the skins are thoroughly cleaned with soap, then dried, and then fat is rubbed on to their inner sides and worked in as thoroughly as possible and as long as any of it is absorbed ; the skins are then placed in a sour bran- drench, which causes a slight swelling after about twenty-four hours ; the bran is then removed, and the tanning is eff...ected by a solution of alum and common salt.
Alumina is a base (see p. 54); hence it does not seem absurd to suppose that other bases might be substituted for alumina in tanning, and that new kinds of leather might thus be produced. A consideration of the properties of various bases by experts led to the conclusion that there are only two which would be worth trying, and these are oxide of iron and oxide of chromium. As a fact leather has been prepared by using these bases ; but only the second has continued to be used.
What to read after Chemistry in Daily Life Popular Lectures?
You can find similar books in the "Read Also" column, or choose other free books by Dr Lassar Cohn to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The details of the various processes 154 CHEMISTRY IN DAILY LIFE.
differ much, but the method is essentially a tannage by fat and alum. Speaking generally, the skins are thoroughly cleaned with soap, then dried, and then fat is rubbed on to their inner sides and worked in as thoroughly as possible and as long as any of it is absorbed ; the skins are then placed in a sour bran- drench, which causes a slight swelling after about twenty-four hours ; the bran is then removed, and the tanning is eff...ected by a solution of alum and common salt.
Alumina is a base (see p. 54); hence it does not seem absurd to suppose that other bases might be substituted for alumina in tanning, and that new kinds of leather might thus be produced. A consideration of the properties of various bases by experts led to the conclusion that there are only two which would be worth trying, and these are oxide of iron and oxide of chromium. As a fact leather has been prepared by using these bases ; but only the second has continued to be used.
What to read after Chemistry in Daily Life Popular Lectures?
You can find similar books in the "Read Also" column, or choose other free books by Dr Lassar Cohn to read onlineMoreLess
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