This for the Dials description.
6. Lastly, for placing your Diall. First, Con∣sider which way, and how much, your Meridian
Posthuma Fosteri the description of a ruler, upon which is inscribed divers scales: and the uses thereof: invented and written by Mr. Samuel Foster, late professor of astronomie in Gresham-Colledg. By which the most usual propositions in astronomy, navigation, and dialling, are facily performed. Also, a further use of the said scales in deliniating of far declining dials; and of those that decline and recline, three severall wayes. With the deliniating of all horizontall dials, between 30 and 60 gr. of latitude, without drawing any lines but the houres themselves.
About this Item
- Title
- Posthuma Fosteri the description of a ruler, upon which is inscribed divers scales: and the uses thereof: invented and written by Mr. Samuel Foster, late professor of astronomie in Gresham-Colledg. By which the most usual propositions in astronomy, navigation, and dialling, are facily performed. Also, a further use of the said scales in deliniating of far declining dials; and of those that decline and recline, three severall wayes. With the deliniating of all horizontall dials, between 30 and 60 gr. of latitude, without drawing any lines but the houres themselves.
- Author
- Foster, Samuel, d. 1652.
- Publication
- London :: printed by Robert & William Leybourn, for Nicholas Bourn, at the South entrance into the Royall Exchange,
- 1654.
- 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
- Astronomy -- Early works to 1800.
- Nautical astronomy -- Early works to 1800.
- Navigation -- Instruments -- Early works to 1800.
- Link to this Item
-
http://name.umdl.umich.edu/A40034.0001.001
- Cite this Item
-
"Posthuma Fosteri the description of a ruler, upon which is inscribed divers scales: and the uses thereof: invented and written by Mr. Samuel Foster, late professor of astronomie in Gresham-Colledg. By which the most usual propositions in astronomy, navigation, and dialling, are facily performed. Also, a further use of the said scales in deliniating of far declining dials; and of those that decline and recline, three severall wayes. With the deliniating of all horizontall dials, between 30 and 60 gr. of latitude, without drawing any lines but the houres themselves." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A40034.0001.001. University of Michigan Library Digital Collections. Accessed June 15, 2025.
Pages
Page 53
ascended or descended from the horizontall line. Then goe to your plain, and there draw the same Meridian line answerably, setting off so many de∣grees by your Scale of Chords. When this is done, take your paper description, and lay the Me∣ridian of it, either upon, or else parallel to, the Me∣ridian drawn upon the plain, and take care to place it the right way; namely so, as that the imaginary style of your paper (or a reall pattern of the style cut fit and set upon the paper Diall) may point into the North or South Pole, according as the plain is esteemed to be a North or South plain. After this is performed, you may transfer each houre from the paper to the plain, and so finish all the work.