Telescopic Work for Starlight Evenings

CONTENTS.

CHAPTER I.
Page
The Telescope, its Intention and the Development of its Powers	1
CHAPTER II.
Relative Merits of Large and Small Telescopes	20
CHAPTER III.
Notes on Telescopes and their Accessories	38
CHAPTER IV.
Notes on Telescopic Work	66
CHAPTER V.
The Sun	87
CHAPTER VI.
The Moon	113
CHAPTER VII.
Mercury	137
CHAPTER VIII.
Venus	145
CHAPTER IX.
Mars	155
CHAPTER X.
The Planetoids	167
CHAPTER XI.
Jupiter	170
CHAPTER XII.
Saturn	195
CHAPTER XIII.
Uranus and Neptune	215
CHAPTER XIV.
Comets and Comet-seeking	227
CHAPTER XV.
Meteors and Meteoric Observations	260
CHAPTER XVI.
The Stars	286
CHAPTER XVII.
NebulÆ and Clusters of Stars	324

Notes and Additions	347
Index	353

Plate I. Interior of Mr. Klein’s Observatory	Frontispiece
II. View of Mr. Klein’s Grounds and Observatory	To face p. 82

Fig.		Page
1.	The Galilean Telescope	7
2.	Royal Observatory, Greenwich, in Flamsteed’s time	8
3.	Sir Isaac Newton	10
4.	Gregorian Telescope	10
5.	Cassegrainian Telescope	11
6.	Newtonian Telescope	11
7.	Common Refracting-Telescope	12
8.	Le Mairean or Herschelian Telescope	13
9.	10-inch Reflecting-Telescope on a German Equatoreal, by Calver	17
10.	Lord Rosse’s 6-foot Reflecting-Telescope	22
11.	Refracting-Telescope, by Browning	32
12.	“The Popular Reflector,” by Calver	40
13.	3-inch Refracting-Telescope, by Newton & Co.	41
14.	Huygens’s Negative Eyepiece	46
15.	Ramsden’s Positive Eyepiece	47
16.	Berthon’s Dynamometer	50
17.	Cooke and Sons’ Educational Telescope	52
18.	Refracting-Telescope on a German Equatoreal	67
19.	The Author’s Telescope: a 10-inch With-Browning Reflector	77
20.	Sun-spot of June 19. 1889	95
21.	Solar Eclipses visible in England, 1891 to 1922	98
22.	Total Solar Eclipse of August 19, 1887	98
23.	Belts of Sun-spots, visible Oct. 29, 1868	104
24.	Shadows cast by FaculÆ	109
25.	Light-spots and streaks on Plato, 1879-82. (A. Stanley Williams.)	126
26.	Petavius and Wrottesley at Sunset. (T. Gwyn Elger.)	129
27.	Birt, Birt A, and the Straight Wall. (T. Gwyn Elger.)	130
28.	Aristarchus and Herodotus at Sunrise. (T. Gwyn Elger.)	132
29.	Mercury as a Morning Star	143
30.	Venus as an Evening Star	150
31.	Mars, 1886, April 13, 9^h 50^m	157
32.	Orbits of the Satellites of Mars	159
33.	Jupiter, as drawn by Dawes and others	178
34.	Jupiter, 1886, April 9, 10^h 12^m	180
35.	Occultation of Jupiter, Aug. 7, 1889	186
36.	Jupiter and Satellites seen in a small glass	187
37.	Shadows of Jupiter’s Satellites II. and III.	192
38.	Saturn as observed by Cassini in August 1676	198
39.	Saturn, 1885, Dec. 23, 7^h 54^m	201
40.	Saturn as observed by F. Terby, February 1887	203
41.	Apparent orbits of the Five Inner Satellites of Saturn	212
42.	Transit of the Shadow of Titan	213
43.	Uranus and his belts	218
44.	Apparent orbits of the Satellites of Uranus	221
45.	Apparent orbit of the Satellite of Neptune	224
46.	Mars, Saturn, and Regulus in same field, Sept. 20, 1889	226
47.	Comet 1862 III. (Aug. 19, 1862)	237
48.	Sawerthal’s Comet, 1888 I. (March 25, Brooks)	237
49.	Brooks’s Double Comet, Sept. 17, 1889	239
50.	Pons’s Comet (1812). Telescopic view, 1884, Jan. 6	242
51.	Ditto. Ditto, 1884, Jan. 21	242
52.	Radiation of Meteors. (Shower of early Perseids, 1878)	263
53.	Double Meteor. Curved Meteor. Fireball	265
54.	Meteorite found in Chili in 1866	265
55.	Meteorite which fell at Orgueil in 1864	265
56.	Fireball of Nov. 23, 1877, 8^h 24^m (J. Plant.)	269
57.	Flight of Telescopic Meteors seen by W. R. Brooks	272
58.	Meteor of Dec. 28, 1888, 6^h 17^m	277
59.	Large Meteor and streak seen at Jask	278
60.	The Constellation Orion	289
61.	Diagram illustrating the Measurement of Angles of Position	291
62.	Double Stars	301
63.	Trapezium in Orion as seen with the 36-inch refractor	319
64.	NebulÆ and a Star-cluster	336
65.	Nebula within a semicircle of stars	342

TELESCOPIC WORK
FOR
STARLIGHT EVENINGS.

Decoration

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