Science papers : chiefly pharmacological and botanical / by Daniel Hanbury ; edited, with memoir, by Joseph Ince.

  • Daniel Hanbury
Date:
1876
Catalogue details

Licence: Public Domain Mark

Credit: Science papers : chiefly pharmacological and botanical / by Daniel Hanbury ; edited, with memoir, by Joseph Ince. Source: Wellcome Collection.

    110/578 page 90
    1853. Q;]-^jg scammony is blackish, rather brittle and opaque, either compact or frothy: fracture not bright, readily affording an emulsion. Treated with ether, I obtained from it 79*3 per cent, of matter soluble in that menstruum. 6. Angora Scammony adulterated with calcareous earth and starch to the extent of 65 to 68 per cent. This scammony is heavy and greyish with a dull clayey fracture. It is evidently very impure, affording only 3 34 per cent, of matter soluble in ether. 7. Imitation Scammony, prepared, says Mr. Maltass, from the refuse of scammony gathered by the Turkish peasants after the extraction of the resin, with the addition of gum arable and rosin. This substance is in hard, opaque, black, irregular cinder- like masses. I have obtained from it 44'28 per cent, of resin soluble in ether. It is needless to comment on the activity of such a compound, yet I am assured that even this would fetch 10s. per pound in the London market. Resin of 8. Pure Besin of Scammony, extracted from Smyrna scam- Scammony. ^^^^ ^£ 1846. Viewed in the mass it is blackish, in small fragments transparent and greenish-brown: very brittle, outer surface and fractured surface brilliant. A very scanty emul- sion is produced when the surface is moistened and rubbed. 9. Besin of Scammony, rather less pure than No. 8. 10. Pure Besin of Angora Scammony: transparent and of, a golden-brown even in the mass. Like the natural Angora scammony, it is cracked in all directions and extremely friable. When moistened and rubbed no emulsion is perceptible. Characters In conclusion I may remark that the striking characters of Scamrnony P^^® natural scammony, I mean the unmixed inspissated juice, are its pale, yellowish-hroion hue, its transparency, its great hrittle- ness, its property of readily affording a white emulsion when Tuhhed with water, and the scanty amount of a ivhite residue which it leaves upon being treated with ether. All these char- acters are well shown in samples 1, 2, and 3. The opaque Black Scammony Ko. 4 although marked pu7'e is
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