 | John Bonnycastle - Trigonometry - 1806 - 464 pages
...place, and cutting the horizon at right angles. The prime vertical, or six o'clock hour line, is the azimuth circle which passes through the east and west points of the horizon ; being that on which the sun rises and sets when the days and nights are equal. The latitude of any... | |
 | Thomas Keith - Navigation - 1810 - 478 pages
...angles. The altitudes of the heavenly bodies are measured on these circles. (N) The prime "vertical is that azimuth circle which passes through the east and west points of the horizon. (O) Meridians are great circles passing through the poles of the world, and cutting the equinoctial... | |
 | John Lathrop - Astronomy - 1812 - 218 pages
...place, and making the other end move along the wooden horizon of the globe. 177. The prime vertical is that azimuth circle •which passes through the...through the north and south points of the horizon. 178. Parallax is the difference between the true altitude of the sun, moon, or a star, if it were observed... | |
 | Thomas Keith - Astronomy - 1819 - 380 pages
...wooden horizon of the globe. 44. The PRIME VERTICAL is that azimuth circle which passes through lie east and west points of the horizon, and is always...45. The ALTITUDE of any object in the heavens, is anarch of a vertical circle, contained between the centre of the object and the horizon. When the object... | |
 | Thomas Keith - 1821 - 408 pages
...place, and making the other end move along the wooden horizon of the globe. 44. The PRIME VERTICAL is that azimuth circle which passes through the east...points of the horizon, and is always at right angles to the brass meridian, which may be considered as another vertical circle passing through the north... | |
 | Edward Bruce (bookseller.) - 1821 - 418 pages
...horizon, it will represent the quadrant of a vertical circle. 24°. The prime vertical is that vertical circle which passes through the east and west points of the horizon. If the quadrant of altitude be fixed upon the zenith, and brought to the east or west points of the... | |
 | Emma Willard - Geography, Ancient - 1822 - 102 pages
...be drawn from the zenith towards the nadir, cutting the horizon at right angles. The Prime Vertical is that Azimuth Circle which passes through the east...the horizon, and is always at right angles with the meridian. Solstitial Points are the first points of Cancer and Capricorn, so called because the sun,... | |
 | Thomas Keith - Navigation - 1826 - 504 pages
...angles. The altitudes of the heavenly bodies are measured on these circles. (N) The prime vertical is that azimuth circle which passes through the east and west points in the horizon. (O) Meridians are great circles passing through the poles of the world, and cutting... | |
 | Emma Willard - Geography, Ancient - 1827 - 104 pages
...he drawn from the zenith towards the nadir, cutting the horiznii at right angles. The Prime Vertical is that Azimuth Circle which passes through the east...the horizon, and is always at right angles with the meridian. Solstitial Points are the first points of Cancer and Capricorn, so called because the sun,... | |
 | William Channing Woodbridge - Geography - 1827 - 494 pages
...nadir, cutting the horizon at right angles. The Prime Vertical is that Azimuth Circle which passés through the east and west points of the horizon, and is always at right angles with the meridian Solstitial Points are the first points of Cancer and Capricorn, so called because the sun,... | |
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VERTICAI is that azimuth circle which passes through the east and west points of the horizon, and is always at right angles with the... 
