Transactions of the American Philosophical Society Held At Philadelphia for P
Transactions of the American Philosophical Society Held At Philadelphia for P
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M.
1 1 2 5 J 3 8 24 Star's R. A. Increafed by 24 hours, - 24 49 Sun's R. A. Computed to i h a. M. (taken from the nautical almanac, or any other table of the fun's R. A. ) fubtradt True time of ftar's paffage over meridian, reckoned from noon, Hour of the night fubtracl:, Time before ftar's paffage, r 24 Which correfponds to true azimuth, 2 23' E. Magnetic azimuth, - - o 38 E.
Variation of the needle, - 1 45 W.
Example II.
In the latitude of about 32 ° north, on the 4th of July 1785, at 48 minu...tes after 10 o'clock at night, iuppofe the magnetic azimuth of the pole ftar, to be 2° 40' eaft; re- quired the variation of the needle.
Star's R. A. + 24", Sun's R. A.
Time of ftar's paffing meridian, Time of obfervation, - Time before ftar comes to meridian, Which correfponds to true azimuth, 2 4' E. Magnetic azimuth, - - 2 40 E.
Variation, - - o 38 E.
Ex-- H.
M.
24 49 6 54 l 7 55 10 48 258 An EASY METHOD of finding the Example III.
Latitude of the place 42 ° north, time of obfervation, January 17th 1785, at 2 h 40™ A.
What to read after Transactions of the American Philosophical Society Held At Philadelphia for P?
You can find similar books in the "Read Also" column, or choose other free books by American Philosophical Society to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
M.
1 1 2 5 J 3 8 24 Star's R. A. Increafed by 24 hours, - 24 49 Sun's R. A. Computed to i h a. M. (taken from the nautical almanac, or any other table of the fun's R. A. ) fubtradt True time of ftar's paffage over meridian, reckoned from noon, Hour of the night fubtracl:, Time before ftar's paffage, r 24 Which correfponds to true azimuth, 2 23' E. Magnetic azimuth, - - o 38 E.
Variation of the needle, - 1 45 W.
Example II.
In the latitude of about 32 ° north, on the 4th of July 1785, at 48 minu...tes after 10 o'clock at night, iuppofe the magnetic azimuth of the pole ftar, to be 2° 40' eaft; re- quired the variation of the needle.
Star's R. A. + 24", Sun's R. A.
Time of ftar's paffing meridian, Time of obfervation, - Time before ftar comes to meridian, Which correfponds to true azimuth, 2 4' E. Magnetic azimuth, - - 2 40 E.
Variation, - - o 38 E.
Ex-- H.
M.
24 49 6 54 l 7 55 10 48 258 An EASY METHOD of finding the Example III.
Latitude of the place 42 ° north, time of obfervation, January 17th 1785, at 2 h 40™ A.
What to read after Transactions of the American Philosophical Society Held At Philadelphia for P?
You can find similar books in the "Read Also" column, or choose other free books by American Philosophical Society to read onlineMoreLess
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