150 / 180
182
VIKEGAR.
"vVhen the liquor has run for the first time
through the graduation vessel, it is not yet
sufficiently
acidified~·
but the weak vinegar
collected in the exterior rece1v1ng cisterns
must be a second time, and, if need be, a
third time, passed through the graduation
tub, in order to convert all the
alcohol
into
acetic acicl.
In general, we may remark that
the stronger the vinous liquor, the more diffi–
cult and tedious is its conversion into vinegar,
but it is so inuch the stronger. To lessen this
difficulty somewhat, it 'yould be well not to
put all the spirits at first into the wash, or
mixed liquors, but to add a little more of it
at the second and third running, especially
when we desire to have very strong vi11egar.
After the
graduation vessel
has been some days
at work, it is
no longe1· necessary
to add vinegar
to the mixture of spirits and water, since the
sides of the gradna,tion tub, the beech chips,
and the pack threads, are all impregnated with
the ferment, and supply its place. The mix-