part in. Alkalies and Neutral Salts. — Liquor Am. 591

the stomach. Combined with a small portion of oil, it forms asaponaceous rubefacient, which is beneficially applied to thethroat in inflammatory sore-throat, and as a friction in deep-seated inflammation and rheumatism. The dose of the solu-tion is from Titx. to ttlxx. in a large cupful of cold water or milk.Wien taken as a poison, if death be not the immediate result,the best antidpte is vinegar.

Officinal preparations. Hydro-sulphuretum Ammonice, E. D.Oleum ammonialum, E. Spirihis Ammonice, L. Linimentum Am-monia, L. D. Spiritus Ammonice succinatus, L. Lin. Camphorcecomp. L.

Aqua ammonite diluta, Edin. Diluted Water of Ammonia.

" Take of water of ammonia, one part; distilled water, twoparts. Mix them together."

This preparation is probably intended for facilitating ex-temporaneous prescription; but as the solution of ammonia isnever given except in a diluted form, it appears to be super-fluous.

LI'QUOR AMMONIA ACETA'TIS, 1 Lond. Solutionof Acetate of Ammonia.

" Take of subcarbonate of ammonia, two ounces {diluted) ;acetic acid, four pints. Add the acid to the subcarbonate ofammonia, until the effervescence ceases."

Aqua Acetatis Ammonia, Edin. Water of Acetate ofAmmonia.

" Take of carbonate of ammonia in powder, any quantity.Pour upon it as much weak acetic acid as will exactly saturatethe ammonia."

Dublin.

" Take of carbonate of ammonia, two ounces. Add by smallportions, with frequent agitation, three pints and a half ofdistilled vinegar, or as much as will saturate the ammonia,which may be ascertained by means of litmus."

Syn. Acetated'ammoniaque liquide (F.), Essigsaures Ammonium liquor (<?.),Liquore di Mindereto {!.).

The subcarbonate of ammonia employed for this preparation,is decomposed by the acetic acid of the distilled vinegar ;which, combining with the ammonia, forms an acetate thatremains dissolved in the water, while the disengaged carbonicacid flies off in the form of gas, exciting effervescence. In ourexperiments, distdled vinegar of a specific gravity of 1007required 320 grains of the subcarbonate to saturate a pint;hence the proportion ordered by the London and DublinColleges is just sufficient for saturating three pints. 8 Owing,however, to the variable proportion of acid in distilled vinegar,

1 Aqua Ammonias Acetatae, P. L. 1787.

5 The mercury of, a thermometer, the bulb of which was immersed in the*olution while effervescing, sunk five degrees.

T "