Occupations > British wine-maker, and domestic brewer

UNDERBACK, AND COOLERS.
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the purpose of mashing equally well. For mea¬
suring the water in the mash-tun, there must also
be a gauge-stick, marked No. 2. The mash-tun
should have a flat cover, made in three pieces.
THE UNDERBACK, OR RECEIVER FROM THE
MASH-TUN.
The underback must be greater in diameter than
the mash-tun, but only about one half the depth,
and of such capacity as to hold from eighty to
ninety gallons. The underback should also have
a tap to it, and a gauge-stick, marked No. 3.
This tap is placed at the side.
THE COOLERS.
The coolers should be made square or oblong, as
may suit the brewhouse, and should be of such
capacity that each may contain from seventy to
eighty gallons of wort at three inches depth, and
have its sides above the wort from two to three
inches. At the end of each cooler there should be
an opening with a sluice to shut down, or by be¬
ing fully lifted up, or partially, to allow the worts
to run rapidly or slowly, as occasion may require.