The magician's own book, or The whole art of conjuring (1862)
Arnold, George, 1834-1865, Cahill, Frank · New York, Dick & Fitzgerald · leaf 204
TRICKS IN MECHANICS.OBLIQUITY OF MOHON. 187 Cut a piece of pasteboard into the following Hhape, anddescribe on it a spiral line ; cut this out with a penknife,
Magic tricks
Internet Archive · University of Pittsburgh Library · Public Domain Mark 1.0. Free to use for anything.
