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Concentrated acetic acid, prepared by decomposing an acetate and receiving the acetic acid by distillation, has a very pungent and grateful odour, and an acid and acrid taste. Its s. g. is about 1.046, and it is very volatile. It is stimulant, rubefacient, and escharotic, and is applied to the nostrils in syncope, asphyxia, headache, &c. It destroys warts. A strong Acetic Acid was ordered by the London pharmacopoeia, prepared from wood. It was called Vinegar of wood, Improved distilled Vinegar, Pyrolig'neous Acid, Ace'tum Ligno'rum, and its strength was such, that 87 gr. of crystallized subcarbonate of soda should saturate 100 grains of the acid. An Acidum aceticum dilutum, Diluted acetic acid, is made by mixing a pint of the strong acetic acid with seven pints of distilled water.-Ph. U. S. Its properties are like those of vinegar.