 | Charles Hutton - Astronomy - 1815 - 686 pages
...Dr. Hooke ; for Dr. Sprat, in his History of the Royal Society, pa. 246, mentions the invention of a new instrument for taking angles by reflection, by which means the eye at once sees the two objects both as touching the same point, though distant almost to a semicircle ;... | |
 | Robert Walsh - Public opinion Great Britain - 1819 - 574 pages
...by Dr. Hooke; for Dr. Sprat, in his History of the Royal Society, p. 246, mentions the invention of a new instrument for taking angles by reflection, by which means the eye at once sees the two objects both as touching the same point, though distant almost to a semi-circle;... | |
 | James Mitchell - Mathematics - 1823 - 666 pages
...by Dr. Hunk ; for Dr. Sprat, in his History of the Royal Society, p. 846, mentions the invention of a new instrument for taking angles by reflection, by which means the eye at once sees the two objects both as touching the same point, though distant almost a semi-circle; which... | |
 | Robert Grant - Astronomy - 1852 - 686 pages
...the Royal Society." Thus, in an account of the inventions of members of the Society, he alludes to " a new instrument for taking angles by reflection,...touching in the same point, though distant almost to a semicircle, which is of great use for making exact observations at sea."ยง The author of this... | |
 | David Brewster - Great Britain - 1855 - 504 pages
...of members of the Royal Society, Sprot mentions " a new instrument for taking angles by reflexion, by which means the eye at the same time sees the two objects both as touching on the same point, though distant almost to a semicircle, which is of great use in promoting exact... | |
 | John Yonge Akerman, Sir John Evans, William Sandys Wright Vaux, Frederic William Madden, Barclay Vincent Head, Herbert Appold Grueber, Edward James Rapson, Oliver Codrington, Sir George Francis Hill, George Cyril Brooke - Numismatics - 1863 - 386 pages
...description of his ingenious instrument. This is called, in Sprat's " History of the Royal Society," "a new instrument for taking angles by reflection, by which means the eye, at the same time, sees two objects, both as touching in the same point, though distant almost a semi-circle, which is of great... | |
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Newton, we must not omit to state, that the germ of it, and something more, had been previously published by Hooke. In giving an account of the inventions of members of the Royal Society, Sprot mentions " a new instrument for taking angles by reflexion,... 