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Mike Frey Slide Rules

Slide Rules and Other Things

Specialized Slide Rules

  • Cox’s Compressed Air Discharge Computer
  • Cox’s Compressed Air Discharge and Pump Computers
  • Harrow Mark Reducer
  • Hoffman Airplane Designer
  • John C. Bellamy Pressure – Height Slide Rule
  • John C. Bellamy Horizontal Temperature & Pressure Gradient Scale
  • Kaufmann’s Posographe

Mike Frey Slide Rules
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