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Solution of Chloride of Soda (However a useful and effective)

however, a useful and effective solution may be obtained. Put 20 grains bicarbonate of soda and 3 ounces distilled water into a flask; keep the liquid near the boiling point and add 12 grains santonin, finely powdered, about 2 grains at a time, until the whole has To a solution of chloride of lime (formed of dissolved. Solution is effected in about half chloride of lime, pound; water, 3 pints), an hour, during which time the water is readd a solution of carbonate of soda (formed duced to 2 ounces, or, if not, may be reduced of carbonate of soda, crystallized, 7 ounces; to that bulk, when 1 ounce will contain a full water, 1 pint), and, after agitation for about dose-6 grains of santonin. The solution is 10 minutes, decant or filter, and preserve the bright and permanent, strongly alkaline, free filtrate in a well-stoppered bottle, and in a from odor and taste, except that of carboncool and dark place. This is the formula of ate of soda. Carefully neutralized with acetic the Dublin Pharmacopeia, and often more acid, an equally bright and permanent soluconvenient than the preceding one. A writer tion is formed. Both may be diluted to any in Boettger's Notizblatt recommends that in extent with hot or cold water without impairpreparing this solution from chloride of lime, ing the solution of santonin. The whole, bicarbonate of soda be used in place of sal- or nearly the whole, of the santonin is presoda. There is no question but that the pre- cipitated in its original form of colorless cipitate will be much less bulky, and more of rectangular plates, with bevelled edges, imthe liquid will be recovered in a concentrated mediately by mineral acids, and after some form by decantation. hours by excess of acetic acid.

4790. Solution of Ammonio-Sul- 4795. Miscible Copaiba. Mix transphate of Copper. Dissolve 1 drachm of parent balsam of copaiba with half its volume the ammonio-sulphate in 1 pint water, and of strong liquid of potassa of double strength. filter. This is stimulant and detergent. Ap- Different samples often require slightly difplied as a lotion to indolent ulcers; and, ferent quantities of the solution of potassa; it largely diluted, to remove specks on the is therefore best to mix them gradually and cornea. Also used as a test for arsenical cautiously together. Should the mixture be compounds, with which it throws down a opaque, a little more of one or other of the green precipitate. ingredients, as the case may be, will render