A Treatise on Practical Astronomy: As Applied to Geodesy and Navigation |
From inside the book
Results 1-5 of 25
Page vii
... Adjustments of the sextant .. Method of observing .... Index error ..... Eccentricity of the sextant ... The chronometer .... Comparison of chronometers .. The clock ....... The chronograph ... 163 164 164 166 168 170 172 174 176 180 ...
... Adjustments of the sextant .. Method of observing .... Index error ..... Eccentricity of the sextant ... The chronometer .... Comparison of chronometers .. The clock ....... The chronograph ... 163 164 164 166 168 170 172 174 176 180 ...
Page viii
... Adjustments of instrument . Methods of observing ... Theory of the transit ... Diurnal aberration .... Equatorial intervals of threads .. Reduction of imperfect transits . Determination of constants : The level constant . The ...
... Adjustments of instrument . Methods of observing ... Theory of the transit ... Diurnal aberration .... Equatorial intervals of threads .. Reduction of imperfect transits . Determination of constants : The level constant . The ...
Page ix
... Adjustment of instrument The observing list ....... Directions for observing ... 481 484 48- Value of micrometer screw . 488 Value of micrometer when level is not known .. 493 General formulę for latitude ...... .. 501 The corrections ...
... Adjustment of instrument The observing list ....... Directions for observing ... 481 484 48- Value of micrometer screw . 488 Value of micrometer when level is not known .. 493 General formulę for latitude ...... .. 501 The corrections ...
Page 179
... adjustment is subject to small disturbances , on account of changes of temperature and other causes . The error caused by an im- perfect adjustment is called the error of runs . The correc- tion for runs is found by reading the ...
... adjustment is subject to small disturbances , on account of changes of temperature and other causes . The error caused by an im- perfect adjustment is called the error of runs . The correc- tion for runs is found by reading the ...
Page 183
... adjusting ; it is therefore especially adapted to the requirements of navigation and exploration . For use on land the sextant is sometimes mounted on a tripod , which adds something to its accuracy . When the instrument is used by a ...
... adjusting ; it is therefore especially adapted to the requirements of navigation and exploration . For use on land the sextant is sometimes mounted on a tripod , which adds something to its accuracy . When the instrument is used by a ...
Contents
1 | |
7 | |
13 | |
20 | |
26 | |
32 | |
41 | |
47 | |
54 | |
65 | |
71 | |
78 | |
84 | |
92 | |
99 | |
107 | |
114 | |
120 | |
127 | |
149 | |
155 | |
162 | |
168 | |
174 | |
180 | |
186 | |
194 | |
207 | |
215 | |
222 | |
229 | |
247 | |
257 | |
265 | |
276 | |
283 | |
388 | |
398 | |
413 | |
423 | |
435 | |
443 | |
460 | |
474 | |
481 | |
487 | |
493 | |
501 | |
507 | |
519 | |
525 | |
535 | |
542 | |
552 | |
558 | |
564 | |
575 | |
583 | |
590 | |
598 | |
609 | |
617 | |
623 | |
Other editions - View all
Common terms and phrases
accuracy altitude angle applied approximation arithmetical mean ascension and declination axis azimuth Bessel catalogue celestial sphere centre chronograph chronometer circle circumpolar stars clamp co-ordinates coefficients collimation computation constant convenient culmination determined difference differential dt dt earth east ecliptic elongation emersion ephemeris equal example follows formulę geocentric given gives Greenwich horizon hour-angle instant latitude limb logarithms longitude mean solar measured meridian method micrometer middle thread moon moon's right ascension multiplied Nautical Almanac obtained occultation parallax plane position prime vertical probable error proper motion reading reduced refraction right ascension screw semidiameter sextant sidereal sin² star's stars observed Substituting subtract telescope tion transit instrument unknown quantities values vernier weight write zenith distance ΙΟ
Popular passages
Page 645 - ... Nutrition 8vo, 4 oo Budd and Hansen's American Horticultural Manual: Part I. Propagation, Culture, and Improvement I2mo, i 50 Part II. Systematic Pomology I2mo...