| Year | 1956 |
| Date | 21-Jun |
| Volume | 114 |
| Issue | 2,874 |
| Page | 1,032 |
| Category | General |
| Part | |
| Title | Mechanics of Magic |
| Author | Eric Hawkesworth |
| Notes | Mechanical aids for illusionists. The lighted cigarette ejector, coin slide and wool trick, the metal card holder with concealed motor, Robert-Houdin's electric-shock chest |