| PAGE |
| Fig. ?1.—The Milky Way | 46 |
| Photo by Easton. |
| Fig. ?2.—Planetary Nebula No. 7009, New General Catalogue | 52 |
| Fig. ?3.—Nebula No. 4594, New General Catalogue | 66 |
| Fig. ?4.—Nebula No. 101 in Messier’s Catalogue | 70 |
| Fig. ?5.—Nebula No. 51 in Messier’s Catalogue | 71 |
| Fig. ?6.—Milky Way Between Cassiopeia and Swan | 76 |
| According to Wolf. |
| Fig. ?7.—Milky Way in Eagle and Sagittarius | 76 |
| According to Wolf. |
| Fig. ?8.—The “trifid” Hole in Eagle | 77 |
| According to Wolf. |
| Fig. ?9.—Tarim River With Lakes and Bayirs | 96 |
| According to Sven Hedin. |
| Fig. 10.—The Former Lake Bonneville in Utah | 106 |
| Fig. 11.—Jupiter, 1909 | 122 |
| According to F. le Coultre. |
| Fig. 12.—Saturn, 1909 | 123 |
| According to F. le Coultre. |
| Fig. 13.—Spectra of the Major Planets | 124 |
| According to V.M. Slipher. |
| Fig. 14.—Venus Observed by Langley in 1882 | 136 |
| Fig. 15.—Rock Fissure at Hango, Sweden | 204 |
| Photo by I.I. Sederholm. |
| Fig. 16.—Earthquake Centers in Calabria | 205 |
| According to I.I. Sederholm. |
| Fig. 17.—Maps of Mars by Schiaparelli and Antoniadi | At the end |
| Fig. 17a.—Maps of Mars by Schiaparelli and Antoniadi | At the end |
| Fig. 18.—Photo of Mars by Lampland | 210 |
| Fig. 19.—Mars on April 8, 1909 | 210 |
| According to Quenisset. |
| Fig. 20.—The South Pole Spot on Mars, 1909 | 210 |
| According to Jarry Desloges. |
| Fig. 21.—Sandstorm on Mars, 1909 | 210 |
| According to Antoniadi. |
| Fig. 22
|
