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The Edinburgh new Dispensatory : containing 1. The Elements of pharmaceutical Chemistry ; 2. The Materia Medica; or the natural, pharmaceutical and medical History, or the Substances employed in Medicine ; 3. The pharmaceutical Preparations and Compositions ; including Translations of the Edinburgh Pharmacopoeia published in 1805, of the Dublin Pharmacopoeia in 1807, and of the London Pharmacopoeia in 1815
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Sect. 1.

Epitome qf Chemistry.

I xxv

cd unchanged, or decomposed, losing their base partially orrotally by heat, base also expelled by baryta, potass, soda,strontia, and lime. Officinal: Muriate, carbonate, acetate,lvydrosulphuret.

Class second. Earthy salts. Either insoluble in wa-ter, or, if soluble, precipitated by sulphuric acid andcarbonate of potass.

Genus i. Baryta. Generally insoluble in water, and inde-composable by fire •, all poisonous and decomposed by the al-kaline carbonates. Officinal; Sulphate, carbonate, and mu-riate.

G. ii. Strontia. Generally insoluble in water, and inde-composable by fire ; not poisonous, and decomposed by thealkaline carbonates, potass, soda, and baryta.

G. in. Lime. Generally sparingly soluble in water, decom-posed by the alkaline carbonates, potass, soda, baryta, andstrontia, and by oxalic acid. Officinal -. Carbonate, muriate,phosphate.

G. iv. Magnesia. Generally soluble in water, and bitter;decomposed by baryta, potass, soda, strontia, and partially byammonia. Magnesiau salts, when added to ammcrniacal salts,containing the same acid, quickly deposite crystals of a tripleammoniaco-magnesian salt. Officinal: Sulphate, carbonate.

G. v. Glucina. Taste sweetish ; decomposed by all the pre-ceding bases •, when recently precipitated by an alkali, solublein carbonate of ammonia, precipitated by an infusion of nut-galls, and succinate of potass.

G. vi. Alumina. Generally soluble in water, taste sweetishand styptic; decomposed by all the preceding bases; when re-cently precipitated, soluble in the alkalies, and in sulphuricacid, precipitated by hydrosulphuret of potass. Officinal:Supersulphate.

G. vii. Yttria. Sweetish styptic taste; decomposed by allthe preceding bases; precipitated by prussiate of potass andiron, and by infusion of galls.

G. viii. Zirconia. Taste austere; decomposed by all thepreceding bases ; precipitate not soluble in the alkalies, andwhen redissolved in muriatic acid, precipitated by hydrosul-phuret of potass, prussiate of potass and iron, and infusion ofgalls.

G. ix. Silica. Forms only one salt with fluoric acid, whichis crystallizable, soluble in excess of acid, and in the 1 alkalinefluates.

 
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