 | John Ewing - Astronomy - 1809 - 672 pages
...the former. The secondaries of the horizon are called azimuth circles, or vertical circles; and that which passes through the east and west points of the horizon is called the prime vertical, while that which passes through the north and south points of it is called the meridian. All these... | |
 | James Renwick - Physics - 1822 - 476 pages
...passes through its zenith, and is, of course, one of the vertical circles. ยป The vertical circle that passes through the east and west points of the horizon, is called the Prime Vertical; it is perpendicular to the meridian. The arc of a vertical circle, intercepted between a heavenly body... | |
 | James Ryan - Astronomy - 1827 - 408 pages
...of any place, and making the other end move along the horizon of the globe. 7. That azimuth circle which passes through the east and west points of the horizon, is called the prime vertical. This circle is always at right angles with the brass meridian, which may be considered as another vertical... | |
 | John Radford Young - Astronomy - 1833 - 286 pages
...directly over the head of the observer is called his zenith, and the opposite one his nadir. That vertical which passes through the east and west points of the...(which passes through the north and south points) at right-angles. The azimuth of a celestial object is an arc of the horizon, comprised between the meridian... | |
 | Andrew Bell - Mathematics - 1842 - 402 pages
...circles are great circles passing through both the poles of the horizon. 389. A vertical circle, passing through the east and west points of the horizon, is called the prime vertical. 390. Small circles, parallel to the equinoctial, are called parallels of declination. 391. Small circles,... | |
 | John Radford Young - Nautical astronomy - 1848 - 412 pages
...opposite one his nadir. That vertical which passes through the east and west points of the horiK zon is called the prime vertical ; it necessarily intersects...(which passes through the north and south points) at rightangles. The azimuth of a celestial object is an arc of the horizon, comprised between the meridian... | |
 | Charles William Hackley - Trigonometry - 1851 - 536 pages
...meridian transit by the siderial clock. The formula for the correction in declination is tical circle which passes through the east and west points of the...passes through the north and south points) at right any .*. The azimuth of a celestial object has been already defined to be an arc of the horizon, comprised... | |
 | Edward Loggan - 1851 - 76 pages
...through the centre of the object and the meridian of the place. PRIME VERTICAL. That vertical circle which passes through the East and West points of the horizon, is called the Prime Vertical. SOLISTIAL COLURES. The Solistial or Solistitial Colures passeth through the points of Cancer and Capricorn,... | |
 | Charles William Hackley - Trigonometry - 1851 - 524 pages
...siderial clock. The formula for the correction in declination is dt = La' -f n6' + cc' tical circle which passes through the east and west points of the horizon is called the pr'niie vertical ; it necessarily intersects the meridian of the place (which passes through the north... | |
 | John William Norie - Nautical astronomy - 1852 - 844 pages
...through the zenith and nadir, and therefore intersect the horizon at right angles. That vertical . circle which passes through the east and west points of the horizon, is called the prime vertical. Celestial meridians, or circles of right ascension, are great circles passing through the poles of... | |
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... the surface of the celestial sphere. The Zenith of an observer is that pole of his horizon which is exactly above his head. Vertical Circles are great circles passing through the zenith of an observer, and perpendicular to his horizon. 
