Astronography, or, Astronomical geography, with the use of globes : arranged either for simultaneous reading and study in classes, or for study in the common method (1854)
e (bond. For the meeting of theaxis with I two opposite points of the Sphere 68 of that axis. And / tki (iris inn fs ,tf A line it at rightangles, oi Licnlai to a plane, when it does not in- cline to either T€y are thosewhich the axis cuts v .-S between the Gh 10. How can yon f«»rm an Kdeaof tl.… … Circle and the Poles. Of the axis of the Earth, theEquator is the Great Circle; the two Tropics and thetwo Polar Circles, and allcircles of latitude are Less-er Circles; and its polesare the Poles of theEarth. 13. Angles are mea-sured by arcs of circles.An arc is any part of acircle less than the…
Astronomy
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