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 |
From inside the book
Results 1-5 of 30
Page xi
... screw 80. Manner of obtaining the subdivisions on a circular instrument when a micrometer microscope is used 81. Description of a transit telescope - 858 *** 0 8 8 62 63 - 63 64 64 64 65 66 82. The fixed wires at the focus of the object ...
... screw 80. Manner of obtaining the subdivisions on a circular instrument when a micrometer microscope is used 81. Description of a transit telescope - 858 *** 0 8 8 62 63 - 63 64 64 64 65 66 82. The fixed wires at the focus of the object ...
Page 62
... screw car- ries its wires through an extent equal to one of the gradua- tions on the scale ab , and this extent is subdivided by the graduations on the circular heads C and D of the screws . The angular value of each graduation depends ...
... screw car- ries its wires through an extent equal to one of the gradua- tions on the scale ab , and this extent is subdivided by the graduations on the circular heads C and D of the screws . The angular value of each graduation depends ...
Page 63
... screw's revolutions . 77. If the micrometrical apparatus be placed in a frame which is capable of being turned about the optical axis of the telescope , and be provided with a graduated circle , as EF , whose centre is in that axis , so ...
... screw's revolutions . 77. If the micrometrical apparatus be placed in a frame which is capable of being turned about the optical axis of the telescope , and be provided with a graduated circle , as EF , whose centre is in that axis , so ...
Page 64
... screw shall carry the wire over exactly one of the five - minute spaces on the circle ( if the latter be so graduated ) , it is preferred to observe the number of revolutions and the part of a revolution made by the screw while the wire ...
... screw shall carry the wire over exactly one of the five - minute spaces on the circle ( if the latter be so graduated ) , it is preferred to observe the number of revolutions and the part of a revolution made by the screw while the wire ...
Page 65
... screw , of being elevated or depressed for the pur- pose of rendering the axis of motion horizontal ; and the other ... screws which pass through the sides of the telescope , in order that the intersection of the horizontal with the ...
... screw , of being elevated or depressed for the pur- pose of rendering the axis of motion horizontal ; and the other ... screws which pass through the sides of the telescope , in order that the intersection of the horizontal with the ...
Contents
1 | |
7 | |
13 | |
18 | |
20 | |
32 | |
41 | |
44 | |
201 | |
203 | |
207 | |
208 | |
214 | |
220 | |
225 | |
228 | |
47 | |
57 | |
62 | |
64 | |
69 | |
72 | |
73 | |
79 | |
80 | |
83 | |
93 | |
96 | |
98 | |
104 | |
105 | |
107 | |
109 | |
110 | |
116 | |
124 | |
129 | |
135 | |
151 | |
153 | |
163 | |
164 | |
170 | |
177 | |
180 | |
183 | |
186 | |
189 | |
232 | |
233 | |
238 | |
251 | |
257 | |
279 | |
281 | |
292 | |
316 | |
318 | |
324 | |
331 | |
337 | |
338 | |
347 | |
350 | |
351 | |
353 | |
357 | |
358 | |
368 | |
372 | |
378 | |
389 | |
390 | |
392 | |
396 | |
398 | |
404 | |
419 | |
Other editions - View all
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
Popular passages
Page 428 - Riddle's Diamond Latin-English Dictionary. A Guide to the Meaning. Quality, and right Accentuation of Latin Classical Words. Royal 32mo.
Page 427 - Howard's Introductory Greek Exercises, and Key. Introductory Greek Exercises to those of Huntingford, Dunbar, Neilson, and others; arranged under Models, to assist the learner: with Exercises on the different Tenses of Verbs, extracted from the Table or Picture of Cebes. By NATHANIEL HOWARD.
Page 425 - A COURSE OF ENGLISH READING, adapted to every Taste and Capacity : with Anecdotes of Men of Letters. By the Rev. JAMES PYCROFT, BA Trinity College, Oxford ; Author of " Latin Grammar Practice," and