Mathematical Instruments: Their Construction, Adjustment, Testing, and Use, Volume 3Lockwood & Company, 1891 |
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Halaman 133
... zenith distances when upon the meridian . The instrument with which the first of these measurements are obtained , is called a transit instrument , transit telescope , or merely a transit . Transits of portable dimensions , besides ...
... zenith distances when upon the meridian . The instrument with which the first of these measurements are obtained , is called a transit instrument , transit telescope , or merely a transit . Transits of portable dimensions , besides ...
Halaman 136
... zenith , which is one point in the meridian ; if , then , we can make it also bisect another point in the meridian , it will move entirely in the meridian . Compute from the tables in the Nautical Almanack. * The horizontal motion given ...
... zenith , which is one point in the meridian ; if , then , we can make it also bisect another point in the meridian , it will move entirely in the meridian . Compute from the tables in the Nautical Almanack. * The horizontal motion given ...
Halaman 137
... zenith to the north point of the horizon , and to the westward , from the zenith to the south point of the horizon ; while if the interval between the inferior and superior passage be the greater , the deviation is in the contrary ...
... zenith to the north point of the horizon , and to the westward , from the zenith to the south point of the horizon ; while if the interval between the inferior and superior passage be the greater , the deviation is in the contrary ...
Halaman 141
... or adding the equation of time , as • The prime vertical is the great circle which passes through the zenith and the east and west points of the horizon . found in the Nautical Almanack , to 24 hours . THE TRANSIT INSTRUMENT . 141.
... or adding the equation of time , as • The prime vertical is the great circle which passes through the zenith and the east and west points of the horizon . found in the Nautical Almanack , to 24 hours . THE TRANSIT INSTRUMENT . 141.
Halaman 145
... zenith distance and altitude . The error of collimation in altitude may then be corrected by adjusting the microscopes to read the true zenith distance and altitude thus found , while the object is bisected by the cross wires of the ...
... zenith distance and altitude . The error of collimation in altitude may then be corrected by adjusting the microscopes to read the true zenith distance and altitude thus found , while the object is bisected by the cross wires of the ...
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Istilah dan frasa umum
accuracy altitude and azimuth atmosphere attached axis azimuth instrument barometer beam compass bearings bisected bubble centre chain clamp cloth coincidence column construction correction cross wires Crown 8vo D. K. CLARK diaphragm difference of altitude difference of level direct Dumpy level Edition ELECTRIC Electrical Engineering Engineering equal equatorial error eye-piece feet fixed fore glass graduated Gunter's chain height hinge-joint horizontal angles horizontal limb Illustrations inches instru intersection length line of collimation means measured ment mercury mercury rises meridian moved object observed obtained parallax parallel plate screws perfect perpendicular plane plot polar distance pole position Practical prism reading reflected image right angles right ascension round scale sextant sixth column spirit level stadiometer staff station STEAM survey tangent screw telescope temperature theodolite thermometer tion transit triangles tube turning vernier plate vertical circle vertical limb wind zero
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