ObscuripediaObscuripediaThe Free Obscure Encyclopedia

Category: Instruments that are not instruments

2 articles

The list below is believed complete, though membership – like everything here – is subject to revision.

  • Celestial theodolite – A flat-Earth method that measures atmospheric refraction with great care and records it as the absence of curvature.
  • Kradian – Proposed unit of angular residue: the amount by which a radian's degree-count and π together exceed sixty.

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