. 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. ed gas being passed into water,or through flues filled with coke, over which avery small stream of cold water constantlyflows, by which it is condensed, and formsLIQUID HYDEOCHLOEic ACID, a substanceafterwards consumed, in large quantities, inthe manufacture o
. 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. ed gas being passed into water,or through flues filled with coke, over which avery small stream of cold water constantlyflows, by which it is condensed, and formsLIQUID HYDEOCHLOEic ACID, a substanceafterwards consumed, in large quantities, inthe manufacture of chloride of lime, and forother purposes. The sulphate of sodium, ob-tained from this or any other source, is wellmixed with an equal weiglit of chalk or lime-stone, and about half its weight of small coal,each being previously ground to powder, andthe mixture is exposed to a strong heat in a reverbatory furnace (see engr.) until thedecomposition of the sulphate is complete, themass during the calcination being frequentlystirred about with a long iron rod; the semi-liquid is now raked into an iron trough, whereit is allowed to cool, whilst the furnace is re-charged with fresh materials. The crudedark-grey product, thus obtained, is known as bfill alkali, or British barilla, and usuallycontains about 22 or 23§ of pure hydrate of. Scotch Soda Furnace. 1512 SODIUM sodium. This is now lixiviated with tepidwater, aud the solution, after defecation, eva-porated to dryness; the residuum is mixedwith a certain quantity of sawdust, coal-dust,or charcoal, and roasted in a reverberatoryfurnace, at a heat not exceeding 700° Fahr.,until all the sulphur is expelled. The productis the soda-ash, soda salt, or Britishalkali, of commerce, and contains about 50§of pure sodium, partly in the state of carbonate,and partly as hydrate, the remainder beingchiefly sulphate of sodium and common this is purified by solution in water,defecation, evaporation, and crystallisation, itfurnishes
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