The Natural Organic Colouring Matters

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Longmans, Green and Company, 1918 - 655 pages
 

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Page 411 - England the minimum of taxable income is £150 a year. The requirements of the Englishman are no doubt more numerous; his standard of living is higher. But on the other hand, it is to be borne in mind that the Englishman lives for himself and his wife and children; whereas the Indian, under the operation of the joint-family system has a large number of relatives to feed and support. In any case I trust the minimum of taxable income will be raised. In this connection I desire to call the attention...
Page xxi - Reissue of THE ART OF DYEING WOOL, SILK AND COTTON. Translated from the French of M. HELLOT, M. MACQUER and M. LE PILEUR D'APLIGNY. First Published in English in 1789. Six Plates. Demy 8vo. 446 pp.
Page xviii - Journal fur praktische Chemie. Journal of the Physical and Chemical Society of Russia. Journal of the Society of Chemical Industry. Journal of the Washington Academy of Sciences.
Page 379 - During the past few years the growers of logwood in Jamaica have been greatly disturbed by an apparent increase on their properties of an unmerchantable variety of the plant known as "bastard...
Page 554 - It.) appears in commerce in three forms : (1) as a pasty matter called archil ; (2) as a mass of a drier character, named persis ; and (3) as a reddish powder called cudbear. It is obtained from various lichens of the genus Roccella, growing on the rocky coasts of the Azores, the Canaries and Cape de Verd Isles, also of the Cape of Good Hope, Madeira, Corsica, Sardinia, &c., and from Ochrolechia tartarea, growing in Sweden and Norway.
Page 614 - Cotton and woollen fabrics can be dyed a dull yellow colour by mere immersion in a boiling extract of Toon flowers. This, however, is not permanent and is removed, although much more quickly from cotton than wool, by the action of soap or dilute alkali. Better results are obtained by the employment of mordants, and the following shades were obtained with mordanted woollen cloth : — Chromium.
Page 93 - Tola was the ancient Phoenician name used by the Hebrews, and even by the Syrians ; for it is employed by the Syrian translator, Isaiah, chap. i. ver. 18. Among the Jews, after their captivity, the Aramaean...
Page 379 - bastard " logwood present a yellow, pale pink, white, or even chocolate coloured surface, instead of the dark red or deep purple bronze-tinted colour of the best logwood. There appears great uncertainty, even when the trees are cut down, as to whether a tree is really a " bastard
Page 562 - ... a characteristic absorption band in the green with an almost total absorption of the violet end. The colouring matter (a) itself is obtained on evaporating the solution. The litmus residue insoluble in alcohol is digested for 24 hours with distilled water, and the filtered deep-coloured solution is evaporated to dryness. The extract thus obtained is repeatedly treated with absolute alcohol containing a little glacial acetic acid and again evaporated, so that all traces of water may be removed,...
Page 217 - ... to Europe for this purpose. The rasped wood is used by the natives of India and Java as a yellow dye, in conjunction with alum, for colouring the robes of the Burmese priests, also for dyeing silk, and for general purposes.

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