Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York : H. Holt and company · leaf 223
re slightly bet-ter represented by supposing the earth to be an elUpsoidwith three unequal axes, the equator itself being an ellipseof which the longest diameter was 500 metres, or aboutone third of a mile, longer than the shortest. This resultwas probably due to irregularities of gravity in those… … Fig. 68. does not point toward the earths centre. Let Fig. 68represent a meridional section of the earth, N S being theaxis of rotation, £ Q the plane of the equator, and 0 theposition of the observer. The line HH, tangent to the * Captain Clarkes results are given in feet, the polar radius…
Astronomy
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