The Theory and Practice of BrewingCombrune, Michael
Science
The Theory and Practice of Brewing
Combrune, Michael
Brewing
As the acrospire, and both the outward and inward skins of the grain
are not dissoluble in water, the glandular or mealy substance is
certainly very inconsiderable in volume and weight: but as in this
alone are contained the fermentable principles of the grain, it
deserves our utmost attention.
We have before seen, that wines, beers, and ales, after the first
fermentation, are meliorated through age by the more refined and gentle
agitations they undergo, and which often are not perceptible to our
senses. To secure this favorable effect, we must form worts capable of
maintaining themselves, for some time, in a sound state. This quality,
however, if not originally in the malt, is not to be expected in the
liquor. Some objections have been raised against this method of
arguing, and these aided by prejudices, often more powerful than the
objections themselves. It is therefore necessary, as malting may be
esteemed the foundation of all our future success, to enquire after the
best and properest methods of succeeding in this process. Let us, for
this purpose, reassume the consideration of the grain, as it comes from
the mow, trace it to the kiln, and observe every change it undergoes
by the action of the fire, from the time that it receives the first
degree of preservation, to that when it is utterly altered and nearly
destroyed.
Barley in the mow, though there its utmost heat should not much exceed
100 degrees, may be extracted or brewed without malting. This the
distiller’s practice daily evinces; but then the extracts, made from
this unchanged corn, are immediately put in the still after the first
fermentation, else they would not long remain in a sound state. Nor
is this method practicable in summer time, as the extracts would turn
sour, before they were sufficiently cooled to ferment. It is true,
by this means, all the charge of the malt duty is saved; but our
spirits thereby are greatly inferior to those of the French.—Boerhaave
recommends the practice of that nation, which is to let the wines
ferment, subside, and be drawn off fine from the lees, before they are
distilled. Was this rule observed in England, distillation would be
attempted only from malted grain, which, if properly extracted for
this purpose, the difference in the spirit would soon shew how useful
and necessary it is to give wines (either from grapes or corn) time to
be softened, and to gain some degree of vinosity before they are used
to this intent.
But might not barleys be dried without being germinated? Undoubtedly
they might; but as they abound with many acids and strong oils, they
would require a heat more intense than malt does, before they were
sufficiently penetrated, and then the oleaginous parts would become so
compact, and so resinous, as nearly to acquire the consistence of a
varnish, scarcely to be mollified by the hottest water, and hardly ever
to be entirely dissolved by that element.
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