Herschel, John F. W. (John Frederick William), Sir, 1792-1871 · London : Longman, Brown, Green, Longmans, and Roberts · leaf 173
137 FIGURE OF THE EARTH. vature. Hence we conclude that the curvature of a meridional section of the earth is sensibly greater at the equator than to¬ wards the poles; or, in other words, that the earth is not spherical, but, flattened at the poles, or, which comes to the same, protuberant at the… … each corresponding to one degree of difference of latitude, or to one degree of variation in the meridian altitude of a star, as referred to the horizon of a spectator travelling along the meridian. Let bN, a A, b B, d D, g G, e E, be the respective directions of the plumb-line at the stations N,…
Astronomy
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