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Chem
[kem]
Examples
In
1819
he
had
announced
that
the
plane
of
po
lari
zed
light
--
for
example
,
a
ray
passed
through
Iceland
spar
--
is
deflected
to
right
or
left
by
various
chem
ical
substances
.
Walter Libby.
An Introduction to the History of Science
.
Editor: Wallace
