Spher"o*graph (?), n. [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.
Spher"o*graph (?), n. [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.
