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Modern Magic: A Practical Treatise on the Art of Conjuring
·
Professor Hoffmann
215
Here
is
the
king
of
hearts
in
my
right
hand,
and
the
king
of
spades
has
passed
to
my
left.
I
will
put
them
in
the
boxes
once
more.”
You
put
each
in
the
box
which
it
before
occupied,
in
doing
so
again
making
the
change,
but
without
closing
the
boxes.
You
continue,
“Please
to
notice
which
I
put
in
each
box--the
king
of
hearts
in
the
right
hand
box,
and
the
king
of
spades
in
the
left
hand
box.
Is
that
right?”
The
audience
reply
in
the
affirmative.
“Excuse
me,”
you
say,
“I
fear
you
are
mistaken.
You
did
not
notice,
perhaps,
that
the
cards
had
changed
again.”
You
show
that
this
is
so,
and
then
close
the
boxes
so
as
to
bring
the
cards
originally
drawn
uppermost.
Opening
them
once
more,
you
show
that
the
cards
have
again
changed,
and
then
remark,
“I
have
shown
you
that
the
secret
does
not
lie
in
the
boxes,
perhaps
you
would
like
to
satisfy
yourselves
that
there
is
no
preparation
about
the
cards,”
which
you
accordingly
hand
for
examination.
Another
form
of
changing
card
is
known
as
a
“flap
card.”
This
is
a
card
across
whose
centre
is
fixed
a
moveable
flap
of
exactly
half
its
size.
When
the
flap
is
folded
one
way,
it
covers
the
upper
half,
and
when
it
is
folded
the
other
way
the
lower
half
of
the
card,
in
each
case
revealing
a
different
surface.
(See
Fig.
58.)
On
one
of
such
surfaces
is
pasted,
say,
a
queen
of
clubs
(made
thin
by
peeling
off
the
back),
and
on
the
other
surface,
say,
a
nine
of
diamonds,
prepared
in
like
manner.
Thus
the
card
will
appear,
according
as
the
flap
is
folded,
alternately
a
queen
of
clubs
or
nine
of
diamonds.
An
india-rubber
spring
tends
to
draw
the
flap
down,
so
that
the
normal
condition
of
the
card
is
to
appear
as,
say,
the
nine
of
diamonds.
When
exhibited
to
the
company,
the
flap
is
forced
over
in
the
opposite
direction,
so
that
the
card
appears
to
be
the
queen
of
clubs.
The
thumb
and
finger
hold
the
flap
down
until
the
right
moment,
when
they
relax
their
pressure,
and
the
flap
flying
up,
the
card
is
instantly
transformed
to
the
nine
of
diamonds.
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