ng to the remainder of the wort. Twelve hours after another gallon
of pure yest is to be added, and the tun well roused, then covered; the
attenuation suffered to proceed to eighty degrees, _but not higher_.
This mode of pitching worts might be successfully applied to other
qualities of beer and ale, and will be found a safe and good process.

_Filtering Operation._

(With a Plate.)

[Illustration

A The fountain.
B B The cocks.
C The trunk communicating with the space between the two bottoms.
D The filtering tub.
E The false bottom.
F The spout for carrying off the ascending liquor.
G The receiver of the filtered liquor by ascent.
H The receiver of the filtered liquor by descent.]

This simple operation, if my view of its effects on malt liquors, as
well as other fermented liquors, be correct, will do more towards their
improvement and preservation, than any thing hitherto attempted to be
tried on them, after their fermentation has been completed; and for
this plain reason, that it will at once disengage them from all
fermentable matter, and render them transparently fine and preserving;
thus immediately fitting them for the bottle, or putting up into tight
casks, for home consumption or exportation, which will soon recover the
beer or ale so treated from the flatness that will necessarily be
induced by a long exposure to the air during the continuance of the
operation; further to remedy which, I would recommend putting into each
barrel, before the cask is filled with this beer, half a pound of
ground rice, then fill, bung down tight, and in a short time briskness
and activity will be restored to the liquor, whether intended for draft
or bottle. This mode might, with equal success, be applied to every
kind of fermented liquor, particularly to cider, wine, and perry, also
to river and rain water. There are two modes of filtration, one by
descent, the other by ascent; the latter operation seems to be the most
perfect, though not the most economical or expeditious.

The preparation of the filtering medium is as follows. Your filtering
vessel should be in proportion to the scale of work you intend
operating on. The vessel containing the filter, should have the form
somewhat of an inverted cone, in proportion wider at top than at
bottom; over the bottom of this vessel should be placed a false one,
about three or four inches distant from the other; this upper bottom
should be perforate