American Journal of Pharmacy, Vol. 30 of 6

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Excerpt from American Journal of Pharmacy, Vol. 30 of 6: Published by Authority of the Philadelphia College of Pharmacy Those who are most careful in this preparatory "leeching" always produce the "cleanest" alcohol. The more dilute the crude spirit is, the more perfectly it is cleansed in the leeches. Hence the more careful rectifyers "reduce" or weaken their whiskey before leeching. The charcoal used by the most successful manufacturers is that made from twigs and small branches. This charcoal they reburn in kilns of their own, and then grind it into coarse powder, commonly with iron balls in a revolving sheet-iron cylinder. The fine powder being separated and rejected, the coarser is spread between folds of blanket upon a false bottom in the "leeches, " to the thickness of six or eight inches, and held in place by stones. The dilute whiskey is then poured upon it and made slowly to percolate it. The cleansed portions of the percolate are then distilled. In applying the method of vapor purification, of course all this tedious, troublesome and expensive leeching would be done away with, and the result be better secured. The experiment appeared worthy of trial, and consequently a model apparatus was set up, and worked with the anticipated result, cleaning all the alcohol from ten gallons of common new whiskey at one process of distillation with about eighteen ounces of common unprepared wood charcoal, and effecting the cleaning so perfectly that solution of nitrate of silver gave no precipitate or blackening after standing with the alcohol exposed to sunlight during many days. A spirit so entirely free from oils is only rarely obtained in the ordinary way, and then constitutes but a very small portion of the "run" of any given "charge." Following this result, (now some five months.) A much larger apparatus was erected, and from this larger apparatus the following figures and description are given: The apparatus consists of a still, a, column, b, upright cooling worm or "goose, " c, two purifiers d and d', and a final condensing worm. The scale of the centre section drawing is inch to the foot. The still is of tinned copper of about eighty gallons capacity, and works a charge of two barrels at a time. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.