Cooley's cyclopaedia of practical receipts and collateral information in the arts, manufactures, professions, and trades including medicine, pharmacy, hygiene, and domestic economy : designed as a comprehensive supplement to the Pharmacopoeia and general book of reference for the manufacturer, tradesman, amateur, and heads of families . popu-lous cities, consist of sulphate of is also found in clayey and peaty soils, andin minute quantity in good air and water.(Brande; Fownes; Letheby.) In the free stateit exists in the juices of some plants, and inthe living blood of animals, and i
Cooley's cyclopaedia of practical receipts and collateral information in the arts, manufactures, professions, and trades including medicine, pharmacy, hygiene, and domestic economy : designed as a comprehensive supplement to the Pharmacopoeia and general book of reference for the manufacturer, tradesman, amateur, and heads of families . popu-lous cities, consist of sulphate of is also found in clayey and peaty soils, andin minute quantity in good air and water.(Brande; Fownes; Letheby.) In the free stateit exists in the juices of some plants, and inthe living blood of animals, and it is freelydeveloped during the decomposition of azotisedvegetable substances, and during the putre-faction of animal matter. Frep. A mixture of fresh hydrate of limewith an equal weight of sal ammoniac (bothdry and in fine powder) is introduced into aglass flask or retort, the beak of which com-municates with one end of a U-shaped tubefilled with small fragments of recently burntquick-lime, and from which extends anotherglass tube, about 18 inches long, having itsfurther end bent up ready to be placed under agas-jar, on the shelf of a mercurial pneumatictrough. (See engr.) The joints being allmade air-tight by collars of India rubber, heat IS applied by means of a spirit-lamp, and assoon as the air contained in the apparatus is. expelled, the gas is collected for use. It can-not be dried by means of chloride of quick-lime may be substituted forthe hydrate in the above process; in whichcase the evolved gas is anhydrous, but a muchgreater heat is then required for its liberation. Comp. Ammonia is a compound of 3 volumesof hydrogen, and 1 vol. of nitrogen, condensedinto two volumes; and by weight of 8235 partsof nitrogen, 1765 parts of hydrogen, or, inother words, of one atomic weight of rutrogenand three of hydrogen, having the formulaNH3. Frop. Gaseous, colourless, invisible; highlypungent, acrid, irritating and alkaline; irre-spirable, unless very largely dilu
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