USE V.
To find the Suns Rising and Setting.
NOte this line of Rising and setting is par∣ticularly for the Latitude of London, or any other place, situated directly East or West
The description and uses of the general horological-ring: or universal ring-dyal Being the invention of the late reverend Mr. W. Oughtred, as it is usually made of a portable pocket size. With a large and correct table of the latitudes of the principal places in every shire throughout England and Wales, &c. And several ways to find a meridian-line for the setting a horizontal dyal. By Henry Wynne, maker of mathematical instruments near the Sugar-loaf in Chancery-lane.
About this Item
- Title
- The description and uses of the general horological-ring: or universal ring-dyal Being the invention of the late reverend Mr. W. Oughtred, as it is usually made of a portable pocket size. With a large and correct table of the latitudes of the principal places in every shire throughout England and Wales, &c. And several ways to find a meridian-line for the setting a horizontal dyal. By Henry Wynne, maker of mathematical instruments near the Sugar-loaf in Chancery-lane.
- Author
- Wynn, Henry, d. 1709.
- Publication
- London :: printed by A. Godbid and J. Playford, for the author,
- 1682.
- Rights/Permissions
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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
- Oughtred, William, 1575-1660 -- Early works to 1800.
- Scientific recreations -- Early works to 1800.
- Sundials -- Early works to 1800.
- Mathematical instruments -- Early works to 1800.
- Cite this Item
-
"The description and uses of the general horological-ring: or universal ring-dyal Being the invention of the late reverend Mr. W. Oughtred, as it is usually made of a portable pocket size. With a large and correct table of the latitudes of the principal places in every shire throughout England and Wales, &c. And several ways to find a meridian-line for the setting a horizontal dyal. By Henry Wynne, maker of mathematical instruments near the Sugar-loaf in Chancery-lane." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A67225.0001.001. University of Michigan Library Digital Collections. Accessed May 9, 2024.
Pages
Page 18
from it, but it may indifferently serve the whole Kingdom. Note also that the great figures stand for the Rising and the other for the setting.
The Rule.
Slide the Cursor of the Axis to the day of the Month, then turn the other side, and the divi∣sion crossing the hole, shews the Suns Rising, and Setting in the line R.
Example 1.
I slide the Cursor to March the 10, and on the other side it shews VI. and 6, for then the Sun rises at 6 and sets at 6.
Example 2.
April the 8, I set the Cursor to the day, and on the other side it shews V. and 7, which is 5 for the Suns Rising and 7 for its Setting.
Example 3.
October the 20, the Cursor being set to the day, on the other side it will shew the Rising to be at a quarter after VII, and the Setting three quarters after 4.
Now having found the Suns Rising and Setting, you may likewife from thence find the length of the day and night, for double the time of the Suns Rising, and you have the length
Page 19
of the Night, and double the time of its setting, gives you the length of the Day, as will appear by the three following Examples.
Example 1.
March the 10, the Sun rises at 6 and sets at 6, now twice 6 is twelve for the length both of day and night.
Example 2.
April the 8, the Sun rises at 5 and sets at 7, now twice 5 is 10 the length of the Night, and twice 7 is 14 the length of the day.
Example 3.
October the 20, The Sun rises at a quarter after 7 and sets at 3 quarters after 4, now twice 7 and a quarter is 14 and a half for the length of the Night, and twice 4 and 3 quarters is 9 and an half for the lenghth of the day; in all which Examples it appears that both the sums of the length of the day and night being added toge∣ther will make 24, the hours contained in a natural day.