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Modern Magic: A Practical Treatise on the Art of Conjuring
·
Professor Hoffmann
466
The
apparatus
in
this
case
consists
of
three
japanned
tin
cones,
about
ten
inches
in
height
by
five
at
the
base,
and
each
having
a
brass
knob
at
the
top--and
an
ornamental
vase
of
tin
or
zinc,
standing
about
the
same
height
as
the
cones,
and
having
a
simple
metal
cover,
or
top.
Of
the
cones
(all
of
which
are
open
at
the
bottom),
two
are
hollow
throughout,
but
the
third
has
a
flap
or
moveable
partition
halfway
down,
inclosing
the
upper
half
of
the
internal
space.
This
flap
works
on
a
hinge,
and
is
kept
shut
by
a
little
catch,
which
is
withdrawn
by
pressure
on
a
little
button
outside
the
cone,
when
the
flap
drops
down,
and
lets
fall
whatever
has
been
placed
in
the
enclosed
space.
(See
Fig.
164.)
The
cone
is
prepared
for
the
trick
by
filling
this
space
with
rice,
and
closing
the
flap;
and
the
three
cones
are
then
placed
in
a
row
on
the
performer’s
table,
the
prepared
one
being
in
the
middle.
The
vase
(see
Fig.
165)
is
constructed
as
follows:--Its
depth
inside
is
less
by
about
an
inch
than
its
depth
outside,
leaving,
therefore,
between
its
true
and
false
bottoms,
an
empty
space,
a.
A
circular
hole
is
cut
in
the
inner
or
false
bottom,
but
this
hole,
in
the
normal
condition
of
the
vase,
is
kept
closed
by
a
circular
disc
of
metal,
b,
exactly
fitting
it.
This
disc
is
soldered
upon
an
upright
wire
rod,
passing
through
the
foot
of
the
apparatus,
and
terminating
in
another
disc,
c,
somewhat
smaller
in
size.
Round
this
rod
is
a
spiral
spring,
whose
action
tends
to
press
it
down,
and
thereby
to
keep
the
disc
or
valve
normally
closed,
though
it
rises,
and
thereby
opens
the
valve
(as
shown
by
the
dotted
lines
in
the
figure),
whenever
upward
pressure
is
applied
to
c.
The
face
of
the
upper
disc,
b,
is
slightly
concave,
corresponding
with
the
rest
of
the
interior
of
the
vase.
The
vase
is
prepared
for
the
trick
by
placing
an
orange
in
it,
and
in
this
condition
it
is
brought
forward
and
placed
on
the
table
by
the
performer
or
his
assistant.
A
small
paper
bag
full
of
rice
is
brought
in
at
the
same
time,
and
completes
the
preparations.
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