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Modern Magic: A Practical Treatise on the Art of Conjuring
·
Professor Hoffmann
415
THE
RED-AND-BLACK-BALL
VASES.--The
receptacle
for
the
ball
is
in
this
case
made
in
the
form
of
a
neat
vase,
and
without
any
of
those
tell-tale
grooves
which
disfigure
the
older
ball-box.
(See
Fig.
128.)
Like
its
prototype,
it
is
in
three
parts,
which
we
will
distinguish
as
before
by
the
letters
a,
b,
and
c.
The
portion
b,
however,
in
this
case
goes
completely
within
the
lid
c,
within
which
it
fits
just
tightly
enough
to
be
lifted
off
with
it.
When,
however,
the
performer
desires
to
leave
b
upon
a,
he
presses
down,
in
the
act
of
lifting
off
the
cover,
a
moveable
button
or
stud
at
the
top.
This
pushes
out
the
shell
b
from
the
cover,
and,
when
the
latter
is
lifted,
leaves
it
upon
a.
When
used
in
pairs,
the
ball-vases
are
usually
made
with
one
red
and
one
black
ball,
the
shells
b
of
each
vase
being
also
one
black
and
one
red.
The
balls
are
first
offered
for
examination,
after
which
the
red
ball
is
placed
in
the
vase
containing
the
black
shell,
and
the
black
ball
in
that
which
contains
the
red
shell.
The
vases
are
then
covered,
and
on
the
covers
being
again
removed,
leaving
the
hollow
shells
upon
the
vases,
the
red
ball
being
covered
by
the
black
shell,
and
the
black
ball
by
the
red
shell,
the
effect
to
the
spectator
is
as
if
the
two
balls
had
changed
places.
By
leaving
alternately
the
one
or
the
other
shell
over
its
respective
vase,
the
ball
in
the
opposite
vase
being
left
uncovered,
the
vases
may
be
made
to
appear
as
if
both
containing
red
balls
or
both
black
balls,
the
genuine
balls
being
finally
again
exhibited
as
at
first.
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