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)
ection from theObservers place, and intersect at right angles a circlewhich is everywhere 90° from it, and which is of coursehis Horizon. The Vertical Circle, whose profile is here astraight line, is the Observers Prime Vertical, since it 8. By what is the Suns appearance and effects changed ?… … MAY 107 ; suns UST.dec.18° : 12.420 6.210 crosses at right angles the North and South Vertical;which of course that is, in which the North and SouthPoles of the Earth are found. Observe that the outercircle of the diagram is composed of two, the one in adotted, and the other in a firm line. It is…
Astronomy
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