Astronomia Britannica exhibiting the doctrine of the sphere, and theory of the planets decimally by trigonometry, and by tables : fitted for the meridian of London ... / by John Newton ...

About this Item

Title: Astronomia Britannica exhibiting the doctrine of the sphere, and theory of the planets decimally by trigonometry, and by tables : fitted for the meridian of London ... / by John Newton ...
Author: Newton, John, 1622-1678.
Publication: London :: Printed for the author by R. and W. Leybourn, and are to be sold by Thomas Piercepoint ...,; 1657.
Rights/Permissions: To the extent possible under law, the Text Creation Partnership has waived all copyright and related or neighboring rights to this keyboarded and encoded edition of the work described above, according to the terms of the CC0 1.0 Public Domain Dedication (http://creativecommons.org/publicdomain/zero/1.0/). This waiver does not extend to any page images or other supplementary files associated with this work, which may be protected by copyright or other license restrictions. Please go to http://www.textcreationpartnership.org/ for more information.
Subject terms: Astronomy -- Early works to 1800.; Planetary theory -- Early works to 1800.; Astronomy -- Mathematics -- Early works to 1800.
Cite this Item: "Astronomia Britannica exhibiting the doctrine of the sphere, and theory of the planets decimally by trigonometry, and by tables : fitted for the meridian of London ... / by John Newton ..." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A52255.0001.001. University of Michigan Library Digital Collections. Accessed May 23, 2024.

Pages

CHAP. 34. To find the beginning and ending of the Suns Eclipse.

BY the visible latitude of the Moon, and the summe of the Semidia∣meters of the Sun and Moon, find the Scruples of incidence, as in the Moones Eclipse Chap. 25.

Page 165

View Page

2 For one hour before the visible Conjunction, find by the 30 Chapter, the visible hourly motion of the Moon from the Sun, by which divide the Scruples of incidence, the quotient is the time of incidence, which subtracted from the time of the visible Conjunction, leaves the beginning of the Eclipse

3 For one hour after the visible Conjunction, finde the visible hourly motion of the Moon from the Sun, by which divide the Scruples of inci∣dence, the quotient is the time of Repletion: which added to the time of the visible Conjunction, gives the end of the Eclipse.

Example.

Summe of the Semidiameters: . 55201
Visible latitude: . 02175
Scruples of Incidence: . 55158
At 1 ho. before the visible ☌ March 27: 20. 90999
Parallax of longitude Orient.: . 13209
True hourly motion of the Moon from the Sun: . 56140
Visible hourly motion: . 45174
Time of incidence: 1. 22150
Beginning of the Eclipse March 27: 20. 68849
At 1 ho. after the visible ☌ 27: 22. 90999
Parallax of longitude Occid.: . 10119
Visible hourly motion of the Moone from the Sun: 48796
Time of repletion 1: h. . 1303••
End of the Eclipse 27: 23. 04029
The whole duration: 2. 35180