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750
Modern Magic: A Practical Treatise on the Art of Conjuring
·
Professor Hoffmann
600
The
handles
further
serve,
as
already
mentioned,
to
move
the
cylinders
backwards
and
forwards
as
may
be
required.
It
should,
however,
be
noted
that
no
backward
or
forward
movement
can
take
place
so
long
as
either
of
the
pistons
stops
the
opening
b;
but
as
soon
as
the
piston
is,
by
turning
the
proper
handle,
depressed
ever
so
little
below
the
level
of
the
surface-plate,
it
no
longer
forms
any
obstacle
to
the
movement.
The
trap
is
fixed
in
the
table
in
such
manner
that
the
handles
g
h
shall
be
just
within
the
opening
at
the
back
of
the
table
(see
Fig.
274),
and
thus
be
within
easy
reach
of
the
performer’s
hands
when
standing
behind
it.
We
will
suppose,
for
the
sake
of
illustration,
that
the
performer
desires
to
change
an
empty
tumbler
(of
small
size)
to
a
full
one.
The
trap
is
beforehand
prepared
by
bringing
the
foremost
cylinder
c
under
the
opening
b.
The
full
glass
is
then
placed
on
the
top
of
the
piston,
which
is
then
lowered
gently
downwards
by
means
of
the
proper
handle,
the
glass
sinking
into
the
cylinder.
The
cylinders
are
now
pushed
forward,
so
that
d
in
turn
comes
under
b,
the
piston
being
then
moved
up
into
its
proper
place,
and
so
closing
the
opening.
This
is,
of
course,
arranged
before
the
curtain
rises.
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