1868 The complete Practical Distiller

THE COMPLETE PRACTICAL DISTILLER.

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of distillation. established for the preparation of fecula, because it does not require, for dis- tillation, the same care and management as when made for domestic purposes. This preparation is composed of two operations : first, the rasping of potatoes; second, the separation of their Even sometimes, when the distiller does not choose to make his own fecula, he buys it from the fecu- This restriction is fecula.

— that of draining.

who submits it to a third operation

list,

Thfese various operations will now be spoken of.

RASPING.

As a matter of course, the object of this operation is to tear the tissue of the vegetable, the cells of which con- tain the fecula which it produces, so that the better the vegetable is divided, the better the rasping will have been executed, and by these means a greater quantity of fecula will be obtained. To this effect, the potatoes are submit- ted to the action of a rasp, already described, and which, though it has not been brought to perfection, appears to be the best made use of. Immediately after this operation, the following com- mences.

SEPARATION OF THE FECULA.*

For this purpose, a large sieve of horse-hair, 2 feet in diameter and 1 foot in depth, is made use of. It is placed above a tub on two cross-pieces, and then filled with a quantity of pulp, equal to about two-thirds of its contents. This pulp is strongly rubbed between the hands, while a