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Text File  |  1992-09-02  |  284b  |  8 lines
  1. Instrument for the measurement of horizontal
  2. and vertical angles, used in surveying. It
  3. consists of a small telescope mounted so as
  4. to move on two graduated circles, one
  5. horizontal and the other vertical, while its
  6. axes pass through the centre of the circles.
  7. See also triangulation.
  8.