|
The astronomical telescope.
|
218
|
|
45,
|
46. The aerial refracting telescope.
|
226
|
|
47.
|
The common refracting telescope.
|
228
|
|
48,
|
49, 50. Manner in which the rays of light are refracted in telescopes.
|
231
|
|
51.
|
Telescope with a single lens.
|
234
|
|
52.
|
Illustrative of spherical aberration.
|
236
|
|
53.
|
Illustrative of the principle of achromatic telescopes.
|
241
|
|
54,
|
55. Double and treble achromatic object-glass.
|
242
|
|
57.
|
Common stand for achromatic telescopes.
|
260
|
|
58.
|
Equatorial stand for achromatic telescopes.
|
262
|
|
59.
|
Dollond’s stand for achromatic telescopes.
|
264
|
|
60.
|
Blair’s fluid achromatic object-glass.
|
271
|
|
61.
|
Barlow’s fluid telescope.
|
274
|
|
62,
|
63, 64, 65, 66. Various forms of reflecting telescopes.
|
288
|
|
67.
|
Gregorian reflecting telescope.
|
293
|
|
69.
|
The aerial reflector.
|
313
|
|
70.
|
Front view of the aerial reflector.
|
314
|
|
71.
|
Construction of large reflecting telescope.
|
322
|
|
72.
|
Reflecting telescope with a single mirror.
|
332
|
|
73.
|
Huygenian eye-piece.
|
336
|
|
74.
|
Ramsden’s eye-piece.
|
339
|
|
75,
|
76. Combination of lenses for achromatic eye-pieces.
|
340
|
|
77,
|
78. Diagonal eye-pieces.
|
344, 345
|
|
79.
|
Terrestrial eye-piece with four lenses.
|
349
|
|
80.
|
Eye-piece of an old Dutch achromatic telescope.
|
356
|
|
81.
|
Pancratic eye-piece.
|
359
|
|
82.
|
Manner of exhibiting the solar spots.
|
384
|
|
84.
|
Mode of measuring distances from one station.
|
430
|
|
85.
|
Cavallo’s micrometer.
|
446
|
|
86.
|
The equatorial telescope, or portable observatory.
|
455
|
|
87.
|
Figure to illustrate the principle of the quadrant.
|
491
|
|
88.
|
The astronomical quadrant.
|
493
|
|
89.
|
The astronomical circle.
|
496
|
|
90.
|
The transit instrument.
|
502
|
|
91.
|
Plan of a private observatory.
|
511
|
|
92.
|
Rotatory dome for an observatory.
|
513
|
|
93.
|
Wheel-work of a planetarium.
|
521
|
|
94.
|
Perspective view of a planetarium.
|
522
|
|
95.
|
Apparatus for exhibiting the retrograde motions of the planets.
|
525
|
|
96.
|
Section of the wheel-work of Dr. Henderson’s planetarium.
|
528
|
|
97.
|
Thirteen views of the supposed form of Saturn’s ring.
|
539
|
|
98.
|
Earl of Rosse’s Great Telescope.
|
559
|
|
99.
|
Section of the machinery connected with the telescope.
|
560
|
|
100.
|
Perspective view of the author’s observatory—to front the title.
|
|
