Here you will find one or more explanations in English for the word Spherograph.
Also in the bottom left of the page several parts of wikipedia pages related to the word Spherograph and, of course, Spherograph synonyms and on the right images related to the word Spherograph.
Spherograph
Spherograph 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.
Meaning of Spherograph from wikipedia
