Page:A Practical Treatise on Brewing (4th ed.).djvu/145

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WINTER BREWING.
129

Mode of accelerating Fermentation when Languid.

A mode different from either, we have uniformly found successful; and it produces the desired effect much more quickly. A very slight rise in the temperature will again promote the fermentation; and the more speedily the required heat can be communicated, the better the effect.

If, therefore, brewing is going on next day, run a certain portion of either the first or second worts, as circumstances may require, into the stationary gyle-tun. Let them be as hot as possible; if only just off the boil, so much the better; about one gallon to a barrel, or even less may be enough.

If no brewing is going on, heat up the requisite quantity of worts, taken from the stationary gyle-tun, to the boiling temperature, or if there be no easy means of doing this, use in the same way about an equal quantity of boiling water. At the same time light a fire in the tun-room to raise the temperature. A little additional yeast set working at a temperature of about 80°, will materially assist.