Apparatus:
distilled
water,
phantom
crystal,
wire
loop
Soak
the
crystals
overnight
in
distilled
water
to
hydrate
them.
Use
the
crystals
sparingly.
4
or
5
in
a
250
mL
Griffin
beaker
is
sufficient.
Description:
These
crystals,
when
hydrated,
have
the
same
index
of
refraction
as
water,
and
are
seemingly
invisible
in
the
beaker.
If
you
are
handling
the
hydrated
crystals,
be
gentle,
as
they
are
quite
fragile.