Scientific notes and comments
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Article
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1887
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Elsevier Science
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English
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C]lemica/JVews.--Hitherto there have been known only vegetable tannin with its 800 varieties, and synthetic tannin or digallic acid, not to speak of the so-called mineral tannin, obtained from coal, peat, etc. The author has for a long time sought for an animal tannin, i. e., one formed in the organ