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 ...

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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.
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Subject terms
Astronomy -- Early works to 1800.
Planetary theory -- Early works to 1800.
Astronomy -- Mathematics -- Early works to 1800.
Link to this Item
http://name.umdl.umich.edu/A52255.0001.001
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 June 4, 2024.

Pages

CHAP. 15. The Poles elevation, with the Suns Altitude and Declination gi∣ven, to find his Azimnth.

IN the oblique angled sphaericall triangle G H F, in the second Dia∣gram of the 12 Chapter, we have known H F the complement of the Suns Declination. 2 The side G F the complement of the poles ele∣vation.

Page 27

3 The side H G the complement of the Suns altitude, to find H G F.

. The side F H
67. 97090
2. The side G F
38. 46667
3. The side H G
44. 54111
Summe
150. 97868
Halfe summe
75. 48934

Sine of G F38. 46667 co. ar.0. 2061682
Sine of H G44. 54111 co. ar.0. 1540214
Diff. G F ½ sum37. 022679. 7796909
Diff. H G ½ sum30. 948239. 7111855
Quadrat of the Sine of ½ the angle 19. 8510560
Half is the Sine of57. 396449. 9255280

whose double 104. 79288 is the Suns Azimuth from the North, and the complement thereof 75. 20712 is the Suns Azimuth from the South.

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