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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    C H A P. I. Of the Copernican Syftem m ge¬ neral. TH E Copernican Syftem is repre- Im fented, Fig. i. where the Sun the puce is placed in the Center, and fuppofed0/the Sua» never to move out of it, but only to move therein round its own (*) Axis, from Weft to Eaft, in the Space of a- bout 25 Days. This Motion of the Sun round its Axis is inferred from the Obfervations made of the Spots of the Sun. Round the Sun, as the Center of r, 2* their Orbitsy move fix Spherical Bo- 0j dies in this Order and Time, viz. ry> Venus, Mercury next to the Sun, in about thr ee Months ; Venus next to Mercury, piter, and in about feven Months and an Half;s*Cu™ >. after that the Earth in a Year ; then Periodical Mars in about two Years; then Jupi-rimes, ter in twelve Years; and outermofi V) tec Ch ip. 5. ScB. and the Note there. ‘ * B 4 of
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