1860 A Treatise on the Manufacture , Imitation, Adulteration and Reduction of Foreign Wines, Brandies, .

VINEGAR. 179 tub. The chips should be prepared for this purpose, by being repeatedly scalded in boiling water, then dried, and imbued with hot vine– gar. The same rneasures rnay also be adopted for the tub. To provide for the renewal of the air, the tub is perforated at about a foot from its bottom with eight holes, set equally apart round the circumference, two-thirds of an inch wide, and sloping down, through which the air may enter into this lower compartment, with– out the trickling liquor being allowed to flow out. In order that the foul air, which has become useless, may escape, four large holes are pierced in the sieve cover, at equal dis– tances asunder, and from the center, whose united areas are rather smaller than the total areas of the holes on the side of the ·tub. Into these four holes, open glass tubes must be inserted, so as to stand some inches above the cover, and to prevent any of the liquor from running through them. The proper circulation of the air takes place through these draught holes. This air