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Modern Magic: A Practical Treatise on the Art of Conjuring
·
Professor Hoffmann
475
The
first
step
towards
the
comprehension
of
the
apparatus
will
be
to
completely
take
out
the
drawer,
which,
however,
even
when
removed,
does
not
at
first
sight
indicate
any
speciality.
On
a
closer
examination,
it
will
be
found
that
the
drawer
is
in
reality
double
(see
Fig.
170),
consisting
of
two
parts,
a
and
b,
the
latter
sliding
backwards
and
forwards
freely
within
the
former,
which
is,
in
fact,
a
mere
case
or
shell,
open
at
one
end.
If
any
object,
suppose
an
orange,
be
placed
in
b,
and
a
and
b
together
be
placed
in
the
outer
case,
it
is
obvious
that,
upon
drawing
out
a,
b
will
come
with
it,
and
the
orange
will
be
seen;
but
if
b
be
held
back,
a
will
be
drawn
out
alone,
and
the
apparatus
will
be
apparently
empty.
For
the
means
of
retaining
a
at
pleasure,
it
will
be
necessary
to
examine
the
outer
case,
which
will
be
found
to
have
a
groove
or
mortice
cut
in
its
under
surface
(see
Fig.
171),
along
which
lies
a
spring
or
tongue
of
wood,
fixed
by
a
screw
at
one
end,
the
other,
or
free
end,
being
provided
with
a
catch
or
stud
c,
which,
upon
pressure,
is
forced
through
an
opening
in
the
bottom
of
the
outer
case,
and
made
to
sink
into
a
little
hole
or
notch
in
the
bottom
of
b,
being
again
withdrawn
by
the
action
of
the
spring
as
soon
as
the
pressure
is
removed.
The
bottom
of
the
outer
case
is
covered
with
velvet,
ostensibly
as
a
finish,
but
really
to
conceal
the
wooden
tongue.
When
it
is
desired
to
draw
out
a
without
b,
the
apparatus
is
held
as
shown
in
Fig.
171,
and
a
gentle
pressure
applied
by
the
finger
through
the
velvet
upon
the
free
end
of
the
wooden
tongue,
thus
forcing
the
catch
upwards,
and
keeping
b
back.
If
a
be
drawn
out
without
this
pressure,
b
will
come
with
it.
The
upper
edge
of
a
is
turned
over
all
round,
so
that
a
casual
observer
is
not
likely
to
detect
any
difference
in
the
thickness
of
the
sides
of
the
drawer,
whether
it
is
drawn
out
with
or
without
its
inner
casing.
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