The purest vinegar which I have ever examined is that manufactured from malt, by Mr. Mackintosh of Glasgow. The strongest malt vinegar is termed _proof vinegar_, and is called by the manufacturer No. 24; it is estimated to contain 4·73 per cent. of real acetic acid.[329] Its strength in relation to the other forms of acetic acid, will be seen by referring to the MEDICINAL DYNAMETER, and to the table inserted under the article ACIDUM ACETICUM FORTIUS. In the former Editions of this work it was stated, that a Vinegar had of late years appeared in the market produced from the distillation of wood, (_Pyroligneous Acid_.) This article has now come into very general use; and the manufacturers have at length succeeded in divesting it of that empyreumatic flavour which had so long rendered it objectionable. See _Acidum Aceticum Fortius e Ligno destillatum_. ACETUM COLCHICI. L. _Vinegar of Meadow Saffron._ Vinegar appears to be a solvent of the acrid and medicinal principle which resides in the bulb of this plant. DOSE fʒss to fʒij. in any bland fluid. See _Colchici Radix_. ACETUM SCILLÆ. L.E.D. _Vinegar of Squill._ This preparation is an acetic solution of the acrid matter of the Squill, upon which its medicinal efficacy depends.[330] DOSE fʒss to fʒij. in cinnamon or mint water. See _Scillæ Radix_. FORM. 107, 114. Alkalies and their carbonates are chemically incompatible with these _Vinegars_. This preparation, as well as the _Oxymel_, deposites when long kept a precipitate consisting of _citrate of lime_ and _tannin_, but its medicinal efficacy is not on that account impaired. ACIDUM ACETICUM DILUTUM. L. Acidum Acetosum Distillatum. E. Acetum Distillatum. D. _Common Distilled Vinegar._