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Modern Magic: A Practical Treatise on the Art of Conjuring
·
Professor Hoffmann
658
The
opposite
edge
of
the
top
of
the
box
is
arranged
as
follows:
b
b
is
a
metal
tube,
with
an
opening
of
about
half-an-inch
in
length
between
d
d;
c
c
are
two
metal
hooks
or
rings
by
which
the
apparatus
is
suspended,
and
through
which
the
current
passes.
Each
of
these
communicates
with
a
piece
of
insulated
copper
wire,
extending
from
c
to
d.
The
space
between
d
d
is
filled
up
by
a
round
plug
or
pencil
of
wood
(see
enlarged
view
in
Fig.
310),
along
which
lies
a
small
piece
of
very
fine
platinum
wire
e
e,
connecting
the
ends
of
the
two
copper
wires.
The
moveable
glass
flap
is
held
up
against
the
top
by
means
of
a
little
piece
of
black
cotton
f,
which,
passing
through
a
minute
hole
in
the
outer
edge
of
the
flap,
is
made
to
pass
round
the
wooden
plug,
and
thus
to
cross
the
platinum
wire
at
right
angles,
and
in
immediate
contact
with
it.
The
practical
application
of
the
scientific
principle
to
which
we
have
alluded
will
now
be
obvious.
At
the
moment
of
completing
the
circuit,
the
platinum,
becoming
red-hot,
instantly
severs
the
cotton,
when
down
falls
the
flap,
not
altering
in
the
least
the
general
appearance
of
the
box,
but
allowing
the
half-crowns
to
fall
loose
into
its
interior.
In
order
to
prepare
the
apparatus
for
use,
it
is
necessary
first
to
remove
the
sliding
lid,
to
place
the
moveable
flap
in
position,
and
to
fasten
it
with
cotton
as
already
described.
The
lid
should
then
be
turned
upside
down,
and
the
half-crowns
placed
in
position,
after
which
the
box
also
is
turned
upside
down,
and
the
lid
allowed
to
slide
gently
into
its
place.
The
half-crowns
are
now
secure,
and
the
box
may
be
brought
forward
and
set
swinging,
without
any
danger
of
their
making
a
premature
appearance.
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