Volume 1
Pharmacographia indica : a history of the principal drugs of vegetable origin met with in British India / by William Dymock , C.J.H. Warden, and David Hooper.
- William Dymock
- Date:
- 1890-1893
Licence: Public Domain Mark
Credit: Pharmacographia indica : a history of the principal drugs of vegetable origin met with in British India / by William Dymock , C.J.H. Warden, and David Hooper. Source: Wellcome Collection.
47/632 page 25
![Microscopic structure.—The.se.eds are thickly set with white feather-shaped hairs, arranged in rows. Chemical composition.—The drug reduced to powder lost 23*5 per cent, of moisture when heated to 100° C. The ash amounted to 17*8 per cent. Treated with 94 per cent, alcohol ]3'4 per ceut. of a dark reddish, bitter, acid extract was obtained. The extract was mixed with water acidulated with hydrochloric acid, and repeatedly agitated with ether. During agitation, blackish resinous matter separated, while the ether became turbid from the separation of a white principle. On filtration of the aqueous solution 2*6 per cent, of a dark resinous body was obtained, which was soluble in ammonia to the extent of 2'54 per cent. The ammoniacal solution was of a dark brown colour, the addition of acids caused the precipita- tion of dirty yellowish flocks; this principle had the pro- perties of an acid resin. The residue insoluble in ammonia amounted to '06 per cent., and was white; it was not further examined. The ethereal solution after filtration yielded ] 63 per cent, of extractive, the residue on the filter was white, and had the physical characters of the principle left after the action of ammonia on the black resin already mentioned. The ethereal extract was redissolved in ether, and agitated with ammonia. On separating the' ether, it left on evaporation '69 per cent, of a greenish-yelloW oily residue, from which a white crystalline principle slowly separated. This crystalline principle will be referred to again. The ammoniacal solution yielded with acids brownish-yellow flocks, which had the properties of an acid resin ; this principle would appear to be similar to the dark resin left as a residue after agitation of the original aqueous solution with ether. The original aqueous acid solution left after separation of the ether was repeatedly agitated with amylic alcohol. The separated amylic alcohol was agitated with ammonia, which became coloured of a deep yellow hue; on separating the 4](https://iiif.wellcomecollection.org/image/b20413415_001_0049.jp2/full/800%2C/0/default.jpg)
