Extra pharmacopoeia : with the additions introduced into the British Pharmacopoeia 1885 / by William Martindale ; medical references and a therapeutic index of diseases and symptoms by W. Wynn Westcott.

  • Martindale, William, 1840-1902.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: Extra pharmacopoeia : with the additions introduced into the British Pharmacopoeia 1885 / by William Martindale ; medical references and a therapeutic index of diseases and symptoms by W. Wynn Westcott. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    This, apain, is immediately decolorised hy an excess of ■acid. It is not suited for ammonia estimation. TropEeoline 00, and Methyl-Orange (Sulpho- benzene-azo-dimethyhiiuine) have also been sug- gested as tests for the presence of free acids. They form yellow solutions; the coloui- of the solution of the former is changed to crimson by acids, that of the latter to pink, but no change of colour is pro- duced either by carbonic acid, acid carbonates, or solutions ofmetallic salts.—Chem. News,ii./8i,288 ; i./83,123; P.J. 1882,273. Sodium Hypobromite, Solution of, see p. 312. Sonstadt's Solution for Testing Gems. Red Iodide of Mercury ...3720 grains. Iodide of Potassium ... 2830 grains. Distilled Water loj drachms (fluid). Dissolve and filter. Has Sp. Gr. 3. Used to test the specific gravity of gems. Quartz and Rock Crystal float in it, Diamond Sp. Gr. S'a, Topaz Sp. Gr. about S'S and Zircon Sp. Gr. 4' to 4-75, sink in it. Pha-nakite Sp. Gr. 8- is suspended in it. A solution having Sp. Gr. 3-36 may be made by using Iodide of Sodium in place of Iodide of Potassium. THAPSIA. The root of Thapsia yarganica, an uiubelliferous plant grown in Algeria (allied to the Silphion of the ancients); when exhausted with spirit yields a resin which is em- ployed in the Prcnch Codex to form a rnbefacicut plaster, Emplastrum Tbapsirc; Fr. Sparadrap de Thapsia, Empia.tre Revulsive de Thapsia. Theina.—See Caffeina, p. 101. THEOBROMINE. I)ose.—\ to 5 gniins. All (nxrnuic bnsc existiug in <u-ao i::^^%~Th'ohr<ma Cacao, it is a white cryslallinc powder, sparingly soluble in water, ahohol and ether. It is allied to Cafle.nc being chemically viewed as dimclhyl-xnnthine and Caffeine as trimethyl-sanlliinc-—S>-'«; Caffeine, p. OJ.