Smith, Hamilton Lanphere, 1819-1903. [from old catalog] · Cleveland, M. C. Younglove and company · leaf 26
um-ference. The circle might have been divided into 1000 parts, andthese subdivided into 100 each, this would give 10,000 minutesor miles for the circumference, but the mile in this case would beshorter. Having assumed the earths circumference 24,000 miles,we next desire to know when we have passed… … accomplished. Let A B C D represent the earth, A C being theequator. A spectator at the pole B, would see the pole star directlyoverhead, but a spectator at A, on the equator, would see the polestar in the horizon. Hence, in travelling from the north pole tothe equator, the elevation of the pole…
Astronomy · Meteorology · Geology · Paleontology
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