The semicircle on a sector in two books. Containing the description of a general and portable instrument; whereby most problems (reducible to instrumental practice) in astronomy, trigonometry, arithmetick, geometry, geography, topography, navigation, dyalling, &c. are speedily and exactly resolved. By J. T.
About this Item
Title
The semicircle on a sector in two books. Containing the description of a general and portable instrument; whereby most problems (reducible to instrumental practice) in astronomy, trigonometry, arithmetick, geometry, geography, topography, navigation, dyalling, &c. are speedily and exactly resolved. By J. T.
Author
Taylor, John, 1666 or 7-1687.
Publication
London :: printed for William Tompson, bookseller at Harborough in Leicestershire,
1667.
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Subject terms
Mathematics -- Early works to 1800.
Navigation -- Early works to 1800.
Dialing -- Early works to 1800.
Cite this Item
"The semicircle on a sector in two books. Containing the description of a general and portable instrument; whereby most problems (reducible to instrumental practice) in astronomy, trigonometry, arithmetick, geometry, geography, topography, navigation, dyalling, &c. are speedily and exactly resolved. By J. T." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A64223.0001.001. University of Michigan Library Digital Collections. Accessed May 24, 2024.
Pages
For South Recliners, and North Incliners.
1. The difference 'twixt your co-latitude,
and the reclination inclination is the elevation, or
height of the style.
2. When the reclination inclination exceeds your
co-latitude, the contrary pole is elevated
so much as the excess. Ex. gr. a North re∣cliner,
or South incliner 50. d. in lat. 52. 30.
min. the excess of the reclination inclination, to
your co-latitude is 12. d. 30. min. and so
much the North is elevated on the recliner,
and the South pole on the incliner.
descriptionPage 117
3. When the reclination inclination is equal to the
co-latitude, its a polar plain.
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