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)
Observers System so intersects the Earth*s,that, mutually, the axis of the one lies in the plane of theGreat Circle of the other, his place is in a Right Sphere.This is one of the two cases in which the central anglesof the Intersection of the two Systems are four RightAngles. All the dwellers in… … £ Q Great Circle of his Movable Positions. They here coin-cide with the firm lines which represent the PermanentPositions of the Earths System ; the Axis of the Earthlying in the plane of the Horizon, and the ObserversLine in that of the Equator. This figure represents the 1. Why, since mankind…
Astronomy
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