COROLL.

Igitur gravitas corporis S secundum SD est ad ejusdem gravitatem

secundum SR sive DC in materiam sphæroidis globo interiori incumbentem

ut 2_k_ ⁄ 3 - 2_kb_² ⁄ 5_l_² + _khhb_² ⁄ _l_⁴ ad 2_h_ ⁄ 3 + _hb_² ⁄

5_l_² - _hkkb_² ⁄ _l_⁴, adeoque si gravitas prior exponatur per _k_,

posterior exprimetur per _h_ - 3_hb_² ⁄ 5_l_² quamproximè. Unde cum

sit DC = _h_, patet gravitatem corporis S in sphæroidem oblatam non

tendere ad centrum C, sed ad punctum _c_ rectæ DC in plano æquatoris

jacentis vicinius puncto D.

Philosophical transactions, Vol. L. Part II. For the year 1758. Giving some account of the present undertakings, studies, and labours, of the ingenious, in many considerable parts of the world. · 第 90 / 119 题