A new manual of the elements of astronomy, descriptive and mathematical .. (1868)
Kiddle, Henry, 1824-1891 · New York, Ivison, Phinney, Blakeman & co.; Chicago, S.C. Griggs & co. · leaf 94
from the earths cen-tre, is the arc of the meridian contained between the places. This angleis found by observing the change of position, with respect to the hori-zon or zenith, which a star appears to undergo when viewed from twodifferent points on the earths surface, one being exactly north of… … Questions.—How is this fact shown? What is the third proof? Illustrate it.Explain by the diagram, b. How is the size of the earth found ? Explain by thediagram. 90 THE EARTH. / / /
Astronomy
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