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Text File  |  1992-09-01  |  208b  |  6 lines
  1. A mechanical device for demonstrating the
  2. motions of the heavenly bodies. Invented
  3. about 1710 by George Graham, it was named
  4. after his patron, the 4th Earl of Orrery. It
  5. is the forerunner of the planetarium.
  6.