Last Updated：2025/12/30
Sentence
Though
a
ſingle
grain
of
copper
diſſolved
in
upwards
of
twenty
gallons
of
clear
water
may
be
detected
by
a
viſible
blue
tinge
appearing
on
the
addition
of
a
few
drops
of
volatile
alcali,
yet
this
is
by
no
means
the
caſe
in
turbid
high-coloured
liquors,
…
Hence
the
neceſſity
of
diluting
ſuch
liquors
in
varying
the
experiments.
In
no
inſtance
did
the
blue
tinge
appear
with
the
alcalis,
even
after
the
wine
was
diluted,
and
yet
its
abſence
does
not
prove
the
liquor
to
be
abſolutely
free
from
an
impregnation
of
copper.
Quizzes for review
Though a ſingle grain of copper diſſolved in upwards of twenty gallons of clear water may be detected by a viſible blue tinge appearing on the addition of a few drops of volatile alcali, yet this is by no means the caſe in turbid high-coloured liquors, … Hence the neceſſity of diluting ſuch liquors in varying the experiments. In no inſtance did the blue tinge appear with the alcalis, even after the wine was diluted, and yet its abſence does not prove the liquor to be abſolutely free from an impregnation of copper.
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