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 . air. Duecaution must be therefore observed regard-ing it. IV. From Wood, by dry distillation. SeePxEOLiGNEOUS AciD. The preparation of thepurified acid, by converting it into an acetate,and subsequent distillation with a strong acid,is noticed above. V. From Al
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 . air. Duecaution must be therefore observed regard-ing it. IV. From Wood, by dry distillation. SeePxEOLiGNEOUS AciD. The preparation of thepurified acid, by converting it into an acetate,and subsequent distillation with a strong acid,is noticed above. V. From Alcohol. (AicOHOi vinegar, Ger-man ACETIC ACID.) In a bell-glass, or anoblong glass case, perforated shelves are ar-ranged, a few inches apart, one above another,on which are placed a number of small flatdishes of porcelain, earthenware, or dishes are filled with spirit of wine ordilute alcohol; and over each is suspended awatch-glass or capsule containing a portion ofplatinum-black; the whole being arranged sothat the platinum-black and the surface ofthe alcohol are not more than 1^ to 2 inches apart. Strips of porous paper are next so hungin the case, that their bottom edges are im-mersed in the spirit, to promote evaporation ;and lastly, the apparatus, loosely covered, isset in a light place at a temperature of from. 70° to 90° Fahr.—the sunshine, when conve-nient. In a short time the temper-ature of theplatinum rises, and the formation of aceticacid begins ; and the condensed vapour tricklesdown the sides of the glass and collects at thebottom of the case, whence it is removed onceor twice a day. (See engr.) The product ofa case of twelve cubic feet content, with 7 or 8oz. of platinum-powder, is capable of produc-ing daily, if well managed, nearly 1-31 lb. ofhydrated acetic acid from 1 lb. of absolutealcohol; 25 lbs. of platinum-powder and 300lbs. of alcohol will, in like manner, furnish adaily supply of nearly 350 lbs. of pure acid,and of other strengths in pr
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