## Practical Astronomy and Geodesy: including the projections of the Sphere and Spherical TrigonometryLongman, Brown, Green and Longmans, 1845 |

### From inside the book

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**observations**made for determining the places of celestial bodies · · 73. The sidereal clock . Its adjustments for the ...**observed**by direct view and by reflexion 68 69 Art . 87. Manner of bringing the meridional wire to CONTENTS . xi. Page xii

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**observed**time of a transit on account of that error 89. Method of ascertaining that the meridional wire and those which are parallel to it are in vertical positions , and that the wire at right angles to them is horizontal - - 69 70 ... Page xv

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**observed**declination of the sun is an ap- proximate value of the obliquity of the ecliptic - - 171. Manner of finding the sun's daily motion in right ascension from**observation**172. Manner of finding approximatively , by simple ... Page xxii

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**observations**; with examples illustrating the manner of correcting the**observed**altitudes and the declinations of the sun , moon , & c . 334. ( Prob . I. ) To find the latitude of a ship or station by means of an**observed**altitude of ... Page xxiii

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**observed**at two times in one day ; with an example * - - - 355. Method of correcting at sea an**observed**zenith distance of the sun on account of the change in the ship's place in the interval between the**observations**356. Conditions ...### Contents

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### Common terms and phrases

aberration altitude angular distance apparent ascension and declination astronomical axis azimuth bisected celestial body celestial sphere centre circle colatitude computed considered correction corresponding cotan degrees described determined diameter difference disk earth ecliptic ellipse equal equator equatorial equinoctial point error expressed fixed star formula given Greenwich heliocentric horary horizontal parallax hour angle instant instrument interval latitude latter let fall mean meridian micrometer moon moon's motion movement Nautical Almanac nearly node noon nutation obliquity observed obtained P'PR parallax parallel perihelion perpendicular plane passing polar distance pole position projection radius vector refraction represented revolution revolve right angles right ascension satellite screw sector semidiameter sidereal sidereal clock sine solar sphere spherical triangle star's station subtracted sun's supposed surface tangent telescope transit transit telescope Trigon variation vertical wire zenith distance zero