Practical Astronomy and Geodesy: Including the Projections of the Sphere and Spherical Trigonometry. For the Use of the Royal Military CollegeLongman, Brown, Green, and Longmans, 1845 - 427 pages |
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Page xi
... micrometer · 60 61 75. Determination of the value of its scale by a terrestrial object - 62 76. The same , by the diameter of the sun and by a transit of the pole - star 77. The position micrometer 78. The micrometer microscope 79 ...
... micrometer · 60 61 75. Determination of the value of its scale by a terrestrial object - 62 76. The same , by the diameter of the sun and by a transit of the pole - star 77. The position micrometer 78. The micrometer microscope 79 ...
Page xiii
... micrometer with an equatorial , in mea- suring angles of position , and small angular distances 120. Manner of deducing from thence the differences of declina- tion and right ascension between two stars , and between Page 89 ཚེ ཚ the ...
... micrometer with an equatorial , in mea- suring angles of position , and small angular distances 120. Manner of deducing from thence the differences of declina- tion and right ascension between two stars , and between Page 89 ཚེ ཚ the ...
Page 60
... MICROMETER . - TRANSIT INSTRUMENT . AZIMUTH AND ALTITUDE CIRCLE . ZENITH COLLIMATOR . - REPEAT- SECTOR . -EQUATORIAL INSTRUMENT . ING CIRCLE . - REFLECTING INSTRUMENTS . 72. THE longitudes and latitudes of celestial bodies are not , now ...
... MICROMETER . - TRANSIT INSTRUMENT . AZIMUTH AND ALTITUDE CIRCLE . ZENITH COLLIMATOR . - REPEAT- SECTOR . -EQUATORIAL INSTRUMENT . ING CIRCLE . - REFLECTING INSTRUMENTS . 72. THE longitudes and latitudes of celestial bodies are not , now ...
Page 61
... Micrometer is an instrument by which small angles are measured ; and it is employed for the purpose of ascertaining the angle subtended at the observer's eye by the diameter of the sun , the moon , or a planet , or by the distance ...
... Micrometer is an instrument by which small angles are measured ; and it is employed for the purpose of ascertaining the angle subtended at the observer's eye by the diameter of the sun , the moon , or a planet , or by the distance ...
Page 62
... micrometer is applied , and it must always be determined by observation : this may easily be effected , when the micrometer is attached to the telescope of a circle revolving in azimuth like the horizontal limb of a theodolite , by ...
... micrometer is applied , and it must always be determined by observation : this may easily be effected , when the micrometer is attached to the telescope of a circle revolving in azimuth like the horizontal limb of a theodolite , by ...
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Practical Astronomy and Geodesy: Including the Projections of the ..., Volume 5 John Narrien No preview available - 2016 |
Common terms and phrases
angular distance apparent ascension and declination astronomical azimuth bisected celestial body celestial sphere centre circle passing circumference colatitude computed considered correction corresponding cosine cotan degrees described determined diameter difference earth ecliptic ellipse equal equator equatorial equinoctial point expressed fixed star formula geocentric given graduation Greenwich Greenwich mean horary motions horizontal parallax hour angle index error instant instrument interval latitude latter let fall limb longitude mean noon meridian micrometer moon moon's Nautical Almanac node observed altitude obtained optical axis orbit parallax parallel perihelion perpendicular plane passing polar distance pole position projection radius refraction represented revolution revolve right angles right ascension satellite screw sector semidiameter side sidereal sidereal clock sine sphere spherical triangle star's station subtended subtracted supposed surface tangent transit telescope true variation vertical wire zenith distance zero
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