148 / 180
180
VINEGAR.
may afterwards pass off through a hole of two
and a half inches diameter, in the upper1nost
cover,
in
which a funnel is placed for the
supply of liquor, as it is wanted to keep up
the percolation.
"The te1nperature of the fermenting com–
partment is ascertained by means of a ther–
mometer, whose bulb is inserted in a hole
through its side, and fastened by a perforated
cork. The liquor collected in the under vessel
runs off by a siphon, inserted near its bottom,
the leg of which turns up
to
nearly the level
of the ventilating air-pipes, before it is bent
outward and downward.
Thus the liquor
will begin to flow out of the under compart–
ment only when it stands in it a little below
the sieve cover, and then it will run slowly off
at the inclined mouth of the siphon, at a level
of about three inches below the lower end of
the glass tubes.
There is a vessel placed
below, upon the ground, to receive it. The
tub itself is supported upon a wooden fraine,