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Modern Magic: A Practical Treatise on the Art of Conjuring
·
Professor Hoffmann
422
The
secret
lies
in
the
fact
that
the
hole
in
the
ball
is
not
made
straight
from
end
to
end,
but
curved,
with
an
angle
or
break
in
the
middle.
(See
Fig.
132.)
So
long
as
the
rope
is
slack,
it
runs
through
easily
enough,
but
as
soon
as
it
is
drawn
taut,
and
thus
forced
into
a
straight
line,
it
is
clipped
by
the
opposite
angles
a,
b,
and
c,
creating
an
amount
of
friction
which
would
support
a
much
greater
weight
than
that
of
the
ball.
The
performer
has,
therefore,
only
to
draw
the
rope
taut
when
he
desires
the
ball
to
remain
stationary,
and
to
slacken
when
he
desires
it
to
run
down.
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