LIST OF ILLUSTRATIONS.
36. Greatest Apparent Distance of an Inferior Planet from the Sun
37. Inferior and Superior Conjunctions—Tilt of an Orbit to the
38. The Phases of an Inferior Planet.
39. Mercury and Venus at tiieir Greatest Elongations from the Sun
40. Alternate Progression and Retrogression of Venus .
41. Path of Venus during a Part of the Year 1884 .
42. Venus Stationary.
43. Greatest and Least Disc of the Sun seen from Mercury .
44. Comparative Discs of the Sun seen from Mercury , Venus , and the
45. Mercury in Transit, Nov. 5, 1868 .
46. The Phases and Varying Apparent Diameter of Venus .
47. Incidence of the Sun ’s Rays in Summer.
48. ,, „ „ Winter.
49. The Sun 's Diurnal Path at Different Times in a Year.
50. The Poles of the Heavens seen in the Horizon at the Equator
51. The Apparent Altitude of a Pole of the Heavens.
52. Diurnal Path of the Sun at the Summer Solstice in Latitude 66*°
53. „ „ „ seen from the Equator .
51. A Spheroid generated by the Revolution of an Ellipse.
55. The Length of a Degree of Latitude increases with the Latitude 56
. Foucault’s Pendulum Experiment.
57. Foucault’s Pendulum at a Pole and at the Equator .
58. The Meaning of Centrifugal Force .
59. The Cavendish Experiment .
60. Oppositions of Mars from 1877 to 1892 .
61. Distances of the Earth , TEthra, Mars , Hilda, and Jupiter from
62. The Forms of a Parabola, an Ellipse , and a Hyperbola.
63. Orbits and Distribution of Minor Planets .
64. The Polar Compression of Jupiter.
65. The Centre of Gravity of Jupiter and the Sun .
66. The Velocities of a Point upon Jupiter ’s Equator.
67. Jupiter , drawn by Mr. De la Hue, October 25th, 1856 .
68. „ showing the Great Red Spot, July 9th, 1878 .
69. „ „ „ Sept. 25th, 1878 .
70. „ March 13th, 1872 .
71. „ April 18th, 1872 .
72. „ Jan. 28tii, 1872 .
73. „ Jan. 30th, 1872 .
74. Configurations of the Satellites of Jupiter in 1610 .
75. The Length of Jupiter ’s Shadow .
76. Relative Positions of the Three Inner Satellites of Jupiter ...
77. Occultations and Eclipses of Jupiter ’s Satellites.
78. Transit of a Satellite and of its Shadow .
79. Size of the Shadow of the 2nd Satellite upon Jupiter .
80. Path of the Fourth Satellite of Jupiter in Space.
81. Path of the First Satellite of Jupiter in Space .
82. Saturn , drawn by Mr. De La Rue, March 27th and 29th, 1856 ...
83. The Phases of Saturn’s Rings .
84. Saturn ’s Ring-plane Sweeping across the Earth ’s Orbit.
85. Disappearances and Reappearances of Saturn’s Rings .
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