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Page xix
... Meridian circle . Fixation of polar and horizontal points . The level , plumb- line , artificial horizon . Principle of collimation . Collimators of Rittenhouse , Kater , and Bohnenberger . Of compound instruments with co - ordinate ...
... Meridian circle . Fixation of polar and horizontal points . The level , plumb- line , artificial horizon . Principle of collimation . Collimators of Rittenhouse , Kater , and Bohnenberger . Of compound instruments with co - ordinate ...
Page 58
... meridian of a station on the earth's surface , is a great circle of the globe passing through both poles and through the place . The plane of the meridian is the plane in which that circle lies . ( 86. ) DEF . 5. The sensible and the 58 ...
... meridian of a station on the earth's surface , is a great circle of the globe passing through both poles and through the place . The plane of the meridian is the plane in which that circle lies . ( 86. ) DEF . 5. The sensible and the 58 ...
Page 59
... meridian line is the line of intersection of the plane of the meridian of any station with the plane of the sensible horizon , and therefore marks the north and south points of the horizon , or the directions in which a spectator must ...
... meridian line is the line of intersection of the plane of the meridian of any station with the plane of the sensible horizon , and therefore marks the north and south points of the horizon , or the directions in which a spectator must ...
Page 62
... meridian of a spectator is the great circle marked out on the sphere by the prolongation of the plane of his terrestrial meridian . If the earth be sup- posed at rest , this is a fixed circle , and all the stars are carried across it in ...
... meridian of a spectator is the great circle marked out on the sphere by the prolongation of the plane of his terrestrial meridian . If the earth be sup- posed at rest , this is a fixed circle , and all the stars are carried across it in ...
Page 63
... meridian of the place of observation . We shall always reckon it positively from the upper culmination ( art . 125. ) westwards , or in conformity with the apparent diurnal motion , completely round the circle from 0 ° to 360 ° . Hour ...
... meridian of the place of observation . We shall always reckon it positively from the upper culmination ( art . 125. ) westwards , or in conformity with the apparent diurnal motion , completely round the circle from 0 ° to 360 ° . Hour ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical attraction axis bright calculation celestial circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Julian period Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena planet planetary pole portion position precession proper motions proportion recede reckoned refraction remarkable respect result revolution revolving right ascension rotation round satellites Saturn seen sidereal sidereal day situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole zenith