"Take of sesquicarbonate of ammonia, four ounces; distilled water, a pint. Dissolve the sesquicarbonate of ammonia in the water, and filter through paper."

Solutio Subcaubonatis Ammoniae, Edin. Solution of Subcarbonate of Ammonia.

"Take of subcarbonate of ammonia, one part; distilled water, four parts. Dissolve the subcarbonate in the water, and filter through paper."

Ammoniae Aqua Carbonatis, Dub. Water of Carbonate of Ammonia.

"Take of carbonate of ammonia, four parts; distilled water, fifteen parts. Dissolve the carbonate of ammonia in ' the water, and filter. The specific gravity of this liquor is, to that of distilled water, as 1090 to 1000."

Syn. Soucarbonate d'ammoniaque (F.) Kohlensaures Ammonium liquor ( 6?.), Liquore Sotto-carbonato di ammoniaco (I.).

This solution has the odour and taste of the concrete sesquicarbonate; it is limpid and colourless; and when shaken with twice its bulk of alcohol, a nearly uniform coagulum is formed. The specific gravity of that of the London College should be 1150. It ought to be kept in small, well-stopped bottles, as by exposure to the air its pungency suffers diminution.

1 M de Lassone first obtained the salt crystallized by sublimation, in long slender, flatted crystals, terminating in sharp points, an inch in length, and of a pearl-white colour. I have obtained them three times that length. They are very deliquescent; impress on the tongue a sense of coldness and sweetness; melt at 170°, and sublime at about 250°. According to Richter, they consist of 68.77 acid, and 31.23 base. They may be readily procured by passing a stream of ammoniacal gas into a solution of strong acetic acid.

Medical properties and uses. - The same as those of the concrete salt. It is given in doses of from f 3ss. to f 3 j. in any bland fluid.