The young gentleman's astronomy, chronology, and dialling, containing such elements of the said arts or sciences, as are most useful and easy to be known / [Edward Wells].

  • Edward Wells
Date:
1725
Catalogue details

Licence: Public Domain Mark

Credit: The young gentleman's astronomy, chronology, and dialling, containing such elements of the said arts or sciences, as are most useful and easy to be known / [Edward Wells]. Source: Wellcome Collection.

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    the innermoft from the Center of Ju¬ piter, to 7 36 the Cube of the Distance of the fecond from the fame Center. Like-wife 3 is to 51 the Square of the Periodical Time of the third Satelles, as 170 to 2890 the Cube of the Di- ftance of the third from the Center of Juf ittr. And again 3 is to 280 the Square of the Periodical Time of the fourth and outermoft Satelles, as 170 to 15800 the Cube of the Diliance of the laid outermoft Satelles from the Center of* Jupiter. And the fame holds good as to the Satellites of Sa¬ turn. But as to the Moon, it is not applicable to her, forafmuch as {he is the only fecondary Planet, that moves about the Earth. From what has been faid, evident¬ ly appears, that the Periodical Moti- p/ ons of the Planets are performed uni - retained u formly , or are regulated by one neral Law. And from hence it is de- Gravity? monftrated (f) by the Learned, that the Planets are likewife retained in their 10. All the (f) See Or. Gregory flare SavHia* ProfefTor at Cx» ford.) his AJhon. Phyi and Gecmy Elem. lib. i. pop, 27* *8, 29' an(i Sett* and 7. ] fhall only oblerve here,,
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