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A treatise on astronomy, descriptive, physical and practical. Designed for schools, colleges, and private students (1849)

Robinson, Horatio N. (Horatio Nelson), 1806-1867 · Albany, N.Y., E.H. Pease & Co.; [etc., etc.] · leaf 72

An illustration from A treatise on astronomy, descriptive, physical and practical. Designed for schools, colleges, and private students, 1849, leaf 72 — but, it being neither stationary, nor a perfect sphere, rent rts ofthe force of gravity, on the different parts of its surface, must the earth;be different. The points on its surface nearest its center ofgravity, must have more attraction than other points moreremote from the center of gravity; and… … 58 ASTRONOMY. Chap» *• the earth, and CD the polar diameter; and it is obviousthat E will be the center of gravity, of the whole figure, andGravity di- ^at ^he force 0f gravity at Q and D will be greater than atrotation. any other points on the surface, because E C, or ED, areless than any other…

Astronomy

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