" Take of carbonate of potassa, twenty ounces; distilled water, a pint. Dissolve the carbonate of potassa in the water; and filter the solution through paper."

Potassae Carbonatis Aqua, Dub. Water of Carbonate of Potassa.

"Take of carbonate of potassa from crystals of tartar, one part; distilled water, two parts. Dissolve and filter."

The specific gravity of this solution is, to that of distilled water, as 1320 to 1000.

Syn. Dissolution de Soucarbonate de Potasse (F.), Flussiges Kohlensaures Kali (G.), Liquore di Sotto-carbonato di Potassa (I.).

In both these formulas the preparation is procured always of a definite strength. The bulk of the fluid is increased rather more than one third part.

Qualities. - This solution should be perfectly clear, colourless, and inodorous; and possess the properties of the carbonate, from which it is prepared. It cannot enter into extemporaneous formulae with vegetable infusions containing much tannin, or with lime-water, magnesia, sulphate of magnesia, or the metallic-salts; as these substances decompose it, or are decomposed by it.

Medical properties and uses. - These are the same as those of the concrete salt. The dose may be from x. to f 3 ij. in any convenient vehicle.