Modern magic. : A practical treatise on the art of conjuring. (1885)
Hoffmann, Professor, 1839-1919, Hawkins, Arthur, ca. 1940 · London ; New York : G. Routledge and Sons · leaf 504
Fig. 302. … MODERN MAGIC. of the two wires are brought in contact, and the circuit is completed;but as soon as the pressure is removed, the stud rises by the action ofa spring, and the circuit is again broken. Among the conjuring tricks depending upon the principle ofelectro-magnetic attraction, the simplest…
Magic tricks
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