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CIDE DICTIONARY

spherograph

CIDE DICTIONARY

spherographn. [Sphere + -graph.].
     An instrument for facilitating the practical use of spherics in navigation and astronomy, being constructed of two cardboards containing various circles, and turning upon each other in such a manner that any possible spherical triangle may be readily found, and the measures of the parts read off by inspection.  [1913 Webster]

For further exploring for "spherograph" in Webster Dictionary Online


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