A manual of chemistry : containing a condensed view of the present state of the science, with copious references to more extensive treatises, original papers, &c: intended as a text-book for medical schools, colleges, and academies . pace of 400 measures, 300 of which are hydrogenand 100 nitrogen. Dr. Henry has made an analysis of ammoniaby means of electricity, and his experiment proves beyond a doubtthat the proportions above given are rigidly exact.—Ann. of Phil. Preparation. Ammonia may be obtained in the form of gas ineither of the following ways : 1. Mix together equal parts of
A manual of chemistry : containing a condensed view of the present state of the science, with copious references to more extensive treatises, original papers, &c: intended as a text-book for medical schools, colleges, and academies . pace of 400 measures, 300 of which are hydrogenand 100 nitrogen. Dr. Henry has made an analysis of ammoniaby means of electricity, and his experiment proves beyond a doubtthat the proportions above given are rigidly exact.—Ann. of Phil. Preparation. Ammonia may be obtained in the form of gas ineither of the following ways : 1. Mix together equal parts of muriate or sulphate of ammonia anddry quick-lime, each separately powdered, and introduce them into asmall 2;lass bottle or retort. Apply the heat of a lamp, and receive thegas that is liberated, over the mercurial trough. 2. To a saturated solution of ammonia in water, or the pure liquidammonia in a gas bottle, apply the heat of a lamp ; and collect the gasis in the former case. A small quantity of this gas, however, may beprepared without a mercurial trough, as follows. Put two or threedrachms of the ammoniacal solution into a Florence flask and adapta bent glass tube to it, supporting it in the manner represented in the. 146 NITROGEN. figure. On heating the aqueous ammonia by a spirit lamp, ammoni»acal gas is abundantly disengaged, and may be collected by displace-ment in an inverted jar or bottle. The vessel in which the gas 19 col-lected must be inverted, as it is lighter than at-mospheric air. When the bottle or jar is full ofgas, which may be known by the dense whitevapours formed when a rod dipped in muriaticacid is brought near the mouth, it must be re-moved and corked tightly. The bent tube isfitted to the flask by being passed through acork. Ammonia has heretofore been found nativeonly in combination with muriatic and phos-phoric acids in the urine ; with sulphuric acidin some mines of alum; with carbonic and ace-tic acid, &c. in putrid animal matter, and in theu
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