40. Diminution of the polar snows of Mars during the summer 136 41. Telescopic aspect of the planet Mars (Feb., 1901) 137 42. Telescopic aspect of the planet Mars (Feb., 1901) 138 43. Chart of Mars 140 44. The Earth viewed from Mars 144 45. Telescopic aspect of Jupiter 150 46. Jupiter and his four principal satellites 155 47. Saturn 159 48. Varying perspective of Saturn's Rings, as seen from the Earth 161 49. The Great Comet of 1858 174 50. What our Ancestors saw in a Comet 177 After Ambroise Paré (1858) 51. Prodigies seen in the Heavens by our Forefathers 178 52. The orbit of a Periodic Comet 182 53. The tails of Comets are opposed to the Sun 185 54. A Meteor 191 55. Shooting Stars of November 12, 1799 196 From a contemporary drawing 56. Fire-Ball seen from the Observatory at Juvisy, August 10, 1899 199 57. Explosion of a Fire-Ball above Madrid, February 10, 1896 200 58. Raphael's Fire-Ball (_The Madonna of Foligno_) 202 59. A Uranolith 203 60. Motion of the Earth round the Sun 222 61. Inclination of the Earth 224 62. The divisions of the globe. Longitudes and latitudes 226 63. To find the long and short months 230 64. The Full Moon slowly rises 234 65. The Moon viewed with the unaided eye 236 66. The Man's head in the Moon 237 67. Woman's head in the Moon 238 68. The kiss in the Moon 239 69. Photograph of the Moon 240 70. The Moon's Phases 241 71. Map of the Moon 247 72. The Lunar Apennines 251 73. Flammarion's Lunar Ring 253 74. Lunar landscape with the Earth in the sky 254 75. Battle between the Medes and Lydians arrested by an Eclipse of the Sun 266 76. Eclipse of the Moon at Laos (February 27, 1877) 269