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

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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 22, 2025.

Pages

1 Example.

I desire to know at what time in the Turkish account, the 5 of June 1649, falls. The work is this

The years compleat are 1648, and are thus turned into Dayes, by the table of Dayes, and Decimals of Dayes in Julian Years.

1000 Julian yeares give dayes
365250
600 years give
219150
40 years give
14610
8 years give
292
May Compleat
151
Dayes
5
The Summe
602088

Page 60

Now because the Turkish account began July the 16. Anno Christi 622, convert these yeares into dayes also thus

600 Julian years give
219150
20 years give
7305
1 year gives
365
June Compleat
181
Dayes
15
The Summe subtract
227016
From
602088
There rests
375072
56142
2987
152
4
900 Turkish years gives
318930
There rests
375072
56142
2987
152
4
150 years gives
53155
There rests
375072
56142
2987
152
4
8 years give
2835
There rests
375072
56142
2987
152
4
Giumadi I. gives
148
There rests
375072
56142
2987
152
4

Therefore the 5th. of June 1649, in our English accompt, falls in the Turkish accompt, in the year of Mahomet, or their Hegira, 1058, the 4th. day of Giumadi II.

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