This is obtained from vinegar by distillation, rejecting the 4th or 8th part that comes over first, and avoiding its acquiring a burnt flavour.
Distilled vinegar is weaker than the common, but is used sometimes in pickles, where its want of colour is an advantage.
393. IMPROVED DISTILLED VINEGAR.
Obtained from wood distilled in large iron cylinders for the manufacture of charcoal for gunpowder; when rectified it is used for all the purposes of distilled vinegar.
394. TO MAKE STRONG ACETOUS ACID.
Take of vitriol, calcined to whiteness, 1 lb.
sugar of lead, 10 drachms,
Rub together and distil.
395. Another.
Take of sugar of lead, 7 lbs.
oil of vitriol 4½ lbs.
Distil 2½ lbs. This is used to make aromatic vinegar.