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TALLOW (M.E. talugh, talg, cf. Du. ta...

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Originally appearing in Volume V26, Page 378 of the 1911 Encyclopedia Britannica.
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TALLOW (M.E. talugh, talg, cf. Du. talk, L. Ger. talg ; the connexion with O.E. taelg, dye, or Goth, tulgus, See also:firm, is doubtful)  , the solid oil or See also:fat of ruminant animals, but commercially obtained almost exclusively from oxen and See also:sheep . The various methods by which See also:tallow and other See also:animal fats are separated and purified are dealt with in the See also:article See also:Oils . Ox tallow occurs at See also:ordinary temperatures as a solid hard fat having a yellowish See also:white See also:colour . The fat is insoluble in See also:cold See also:alcohol, but it dissolves in boiling alcohol, in See also:chloroform, See also:ether and the essential oils . The hardness of tallow and its melting-point are to some extent affected by the See also:food, See also:age, See also:state of See also:health, &c., of the animal yielding it, the firmest ox tallow being obtained in certain provinces of See also:Russia, where for a See also:great See also:part of the See also:year the oxen are fed on See also:hay . New tallow melts at from 42.5° to 43° C., old tallow at 43.5°, and the melted fat remains liquid till its temperature falls to 33° or 34° C . Tallow consists of a mixture of two-thirds of the solid fats palmitin and stearin, with one-third of the liquid fat olein . Mutton tallow differs in several respects from that obtained from oxen . It is whiter in colour and harder, and contains only about 30 per cent. of olein . Newly rendered it has little See also:taste or See also:smell, but on exposure it quickly becomes rancid . Sweet mutton tallow melts at 46° and solidifies at 36° C.; when old it does not melt under 49°, and becomes solid on reaching 44° or 45° C . It is sparingly soluble in cold ether and in boiling alcohol .

End of Article: TALLOW (M.E. talugh, talg, cf. Du. talk, L. Ger. talg ; the connexion with O.E. taelg, dye, or Goth, tulgus, firm, is doubtful)
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