Medicines, their uses and mode of administration : including a complete conspectus of the three British pharmacopoeias, an account of all the new remedies, and an appendix of formulae / by J. Moore Neligan.
- John Neligan
- Date:
- 1849
Licence: Public Domain Mark
Credit: Medicines, their uses and mode of administration : including a complete conspectus of the three British pharmacopoeias, an account of all the new remedies, and an appendix of formulae / by J. Moore Neligan. Source: Wellcome Collection.
Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)
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![earthen vessel with the acid, and add gradually seven parts (Ovj., E.) of water; agitate ; digest for 3 days, adding water that the materials may not become dry, (aDd agitate continually, D.); then add seven parts (Ovj., E.) of boiling water, and strain through linen, washing with warm water so as to remove all the acid; let the impurities subside, and evaporate the clear liquor to one half (to Ovj., E.) ; (let the impurities again settle, and to the clear liquor poured off and heated to ebullition, E.) then add eight parts (sufficient to neutralize the acid, E.) of carbonate of soda previously dissolved in boiling water ; strain, and by alternate evaporation and cooling obtain crystals which are to be kept in a close vessel, (which, if requisite, may be purified by recrystallization, D.). (More crystals will be obtained by suc- cessively evaporating, adding a little carbonate of soda till the liquid exerts a feeble alkaline reaction on litmus paper, and then allowing it to cool, E.). Physical Properties.—Transparent, colourless crystals, the form of which is the oblique rhombic prism ; inodorous, with a cooling, saline, not unpleasant taste. Sp. gr. 1333. Chemical Properties.—It is composed of 2 eq. of soda, 1 of phos- phoric acid, 1 of basic water, and 24 of water of crystallization, (HO, 2 Na 0, PO5 -j- 24 HO) ; it effloresces and becomes opaque by expo- sure to the air ; moderately heated it fuses in its water of crystalliza- tion, which if the heat be increased is driven off. Phosphate of soda dissolves in four times its weight of cold water, and in twice its weight of boiling water ; the solution has a feeble alkaline reaction; it is nearly insoluble in alcohol. Adulterations.—This salt is in general tolerably pure ; if the pre- cipitate occasioned in a solution by muriate of baryta be not entirely dissolved by nitric acid, a sulphate is present; and if that caused by nitrate of silver be not dissolved by nitric acid, a muriate is present. Therapeutcal Effects.—A mild saline cathartic, resembling in its operation the sulphates of magnesia and soda, to either of which it should be preferred for children and delicate persons, in consequence of the mildness of its taste. It is particularly adapted as a cathartic for individuals affected with deposits of uric acid in the urine, as it possesses a remarkably solvent action on that acid. Dose and Mode of Administration.—3iv. to 3xij. ; it may be given dissolved in water or in any of the cathartic vegetable infusions; or it is readily taken by children dissolved in broth or soup, to which it imparts only a saline taste. Incompatibles.—The mineral acids; lime water; magnesia ; chlo- ride of barium ; nitrate of silver, and the acetates of lead. SoDiE et Potass^: tartras, [U. S.] D. E. Sod^; Potassio-tartras, L. Tartrate of Soda and Potash; Rochelle salt- Preparation.—D. L. E.—Carbonate of soda, five part3 (§xij., L. E.); bitartrate of potash, in fine powder, seven parts (§xvj., L. E.); boiling water, fifty parts (Oiv., L. E); to the carbonate of soda dissolved in the water, add by degrees (to neutralization, E.) the bitartrate of potash; evaporate the filtered liquor (till a pellicle forms on its surface, L. E.), and set it aside, that as it cools crystals may be formed. (Evaporate the liquor again that it may yield crystals, L. E.). Physical Properties.—This salt occurs in large, beautiful, trans- parent crystals, which are right rhombic prisms, generally produced](https://iiif.wellcomecollection.org/image/b21143602_0127.jp2/full/800%2C/0/default.jpg)
