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Creators Title Comments & References Year Source Page AA Categories
H. R. Fisher The Slide Rule Trick spectator does some actions with slide ruler, performer in the end divines the number he started with
Related to June 1974 The Pallbearers Review Vol. 9-10 (Vol. 9 No. 8) 750
Karl Fulves Hummer Effects Hummer effects owned by Glenn Davidson, without explanation
  • The Magic Slide Rule
  • Geometro
  • Black Trick-O-Nometry
Related to 1980 Bob Hummer's Collected Secrets 82