 | John Keill - 1739 - 504 pàgines
...or P i, deducted from the greateft Altitude SO, or added to the leaft s O, will give PO the Altitude of the Pole above the Horizon, which is equal to the Latitude of the Place. If the Declination of the Sun be known, we may find out the Latitude of the Place in... | |
 | John Wright (Mathematician) - 1772 - 298 pàgines
...angle ; and the fide that is required is the meafure of the angle XII A I. The fide that is given is the elevation of the pole above the horizon, which is equal to the latitude of the place : the angle that is given is meafured by the number of degrees of the equator intercepted... | |
 | Charles William Hackley - 1838 - 338 pàgines
...Mendoza Rios, Mr. Riddle's book on Navigation and Nautical Astronomy, and the work of Dr. Bowditch. It should also be observed here, that in the preceding...above the horizon, which is equal to the latitude. 112. To determine the latitude at sea, by means of two altitudes of the sun, and the time between the... | |
 | Charles William Hackley - 1838 - 328 pàgines
...Astronomy, and the work of Dr. Bowditch. It should also be observed here, that in the preceding ex-- amples the celestial object is supposed to be on the meridian...above the horizon, which is equal to the latitude. 112. To determine the latitude at sea, by means of two altitudes of the sun, and the time between the... | |
 | Charles William Hackley - 1851 - 536 pàgines
...But, if a meridian altitude be taken below the pole, which may be done if the object is circinnpolar, or so near to the elevated pole as to perform its...the pole above the horizon, which is equal to the latitude.f 112. To determine the latitude at sea, by means of two altitudes of the sun, and the time... | |
 | Charles William Hackley - 1851 - 524 pàgines
...But, if a meridian attitude be taken below the pole, which may be done if the object is circumsolar, or so near to the elevated pole as to perform its...be equal to the sum of the true altitude, and the codech'nation or polar distance of the object ; for this sum will obviously measure the elevation of... | |
 | 1907 - 710 pàgines
...called the circle of perpetual occultatlon. Since the angle PON, measured by the arc NP, is equal to the elevation of the pole above the horizon, which is equal to the latitude of the observer, it follows that the polar distance of any point in the circle of perpetual apparition,... | |
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It should also be observed here, that in the preceding examples the celestial object is supposed to be on the meridian above the pole ; that is, to be higher than the elevated pole. But, if a meridian altitude be taken below the pole, which may be done... 