Page:A Practical Treatise on Brewing (4th ed.).djvu/209

Rh We have sixteen barrels of first worts, and therefore require ten barrels and three firkins of second worts to make up the required quantity—what number of barrels should be turned out of copper?

You must therefore turn out of the copper, in round numbers, thirteen barrels by gauge.

We find, in the fermenting tun, 26.5 barrels at 24.2, making 641.3 lbs. of gravity: the previously calculated gravity being 646, not one per cent. difference.

This is quite near enough for practice. It will be seen, that in the above process of making the extract, none of the worts can possibly get tainted from lying too long in the underback, or elsewhere, and this mode of procedure is calculated to make the best possible extract from the malt which circumstances will permit. If all is right, the fermentation will go on regularly, as before described; if it does not, the cause of failure must be traced and removed.

To ﬁnd the gravity per quarter, divide 641.3 by 8, the number of quarters used: 8 ÷ 641.3 = 80.1, omitting fractions.