The young gentleman's astronomy, chronology, and dialling ... / [Edward Wells].

  • Edward Wells
Date:
[1712]
Catalogue details

Licence: Public Domain Mark

Credit: The young gentleman's astronomy, chronology, and dialling ... / [Edward Wells]. Source: Wellcome Collection.

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    that Circle which bounds the Sight in the faid Place, and is by Aflronotners called the (*) Hot tzon ^ E the eaft Point of the faid Horizon, W the Weft : the Circle a b c d e f denotes the Circumference of the Heavens $ the Circle S the Sun in the Heavens $ the Semicircle PR.T, the enlightened Hemifphere of the Earth, or that Half of it which is oppofite to the Sun 5 the Semicircle PHT, the darkened Hemifphere of the Earth. Now the Earth being fuppofed in this Situati¬ on, and alfo to move round its Axis towards the Sun 5 it is evident, that the Place P of the Earth will juft be¬ gin to be enlightened by the Sun, and fo the Sun will appear there to be juft Rifing, or afeending the Horizon at E the eaft Point of it. The Earth be¬ ing moved round its own Axis, fo as that the Place P of the Earrh, which afore was under the Point a in the Heavens, now is under the Point b 5 it is evident, that the Horizon of the faid Place P, will be now fo fituated, as that the Sun will appear to a Spe- (*) It is a Greek, Word, denoting in that Tongue fomewhat that bounds. [C 3] &atqr V
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