Evans, Henry Ridgely, b. 1861 · Chicago : The Open court Pub. Co.; [etc., etc.] · leaf 159
the position shown. This is connected with the tubular support,which may be connected by a tube through the leg of the stool,and another tube beneath the stage, with an assistant behind thescenes. By compressing or exhausting air through this tube itis obvious that the lever, N, will be raised or…
Magic tricks
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