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
PROBL. 17.
The altitude and declination of any Star, with
the right ascension of the Sun, and hour of
night given to find the Stars right ascension.
By Probl. 5. or 14. find the Stars hour
from the Meridian. Then on the line twice
12, or 24, set one point of your Compasses
in the Stars hour (thus found) and extend
the other to the hour of the night. Upon the
same line with this distance set one point of
your Compasses in the right ascension of the
descriptionPage 22
Sun, and turning the other point the same
way, as you did for the hour, it gives the
Stars right ascension.
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