| FIG. |
PAGE |
| 1. |
VESUVIUS, AS SEEN FROM THE ISLAND OF NISIDA, IN
MODERATE ACTIVITY |
2 |
| 2. |
ERUPTION OF VESUVIUS IN 1882 |
4 |
| 3. |
ERUPTION OF VESUVIUS IN 1872 |
6 |
| 4. |
PHOTOGRAPH OF VESUVIUS, 1906. CHIEFLY CLOUDS OF
ASHES |
8 |
| 5. |
BLOCK LAVA ON MAUNA LOA |
10 |
| 6. |
THE EXCELSIOR GEYSER IN YELLOWSTONE PARK, U. S. A.
REMNANT OF THE POWERFUL VOLCANIC ACTIVITY IN THE TERTIARY AGE |
11 |
| 7. |
MATO TEPEE IN WYOMING, U. S. A. TYPICAL VOLCANIC"NECK" |
12 |
| 8. |
CLEFTS FILLED WITH LAVA AND VOLCANIC CONE OF ASHES,
TOROWHEAP CAÑON, PLATEAU OF COLORADO |
13 |
| 9. |
THE KILAUEA CRATER ON HAWAII |
15 |
| 10. |
CHIEF EARTHQUAKE CENTRES, ACCORDING TO THE BRITISH
ASSOCIATION COMMITTEE |
22 |
| 11. |
CLEFTS IN VALENTIA STREET, SAN FRANCISCO, AFTER THE
EARTHQUAKE OF 1906 |
25 |
| 12. |
SAND CRATERS AND FISSURES, PRODUCED BY THE CORINTH
EARTHQUAKE OF 1861. IN THE WATER, BRANCHES OF FLOODED TREES |
27 |
| 13. |
EARTHQUAKE LINES IN LOWER AUSTRIA |
30 |
| 14. |
LIBERTY BUILDING OF LELAND STANFORD JUNIOR UNIVERSITY,
IN CALIFORNIA, AFTER THE EARTHQUAKE OF 1906 |
32 |
| 15. |
EARTHQUAKE LINES IN THE TYRRHENIAN DEPRESSION |
34 |
| 16. |
SEISMOGRAM RECORDED AT SHIDE, ISLE OF WIGHT, ON
AUGUST 31, 1898 |
35 |
| 17. |
PHOTOGRAPH OF THE SURFACE OF THE MOON, IN THE VICINITY
OF THE CRATER OF COPERNICUS |
62 |
| 18. |
SUN-SPOT GROUP AND GRANULATION OF THE SUN |
74 |
| 19. |
PART OF THE SOLAR SPECTRUM OF JANUARY 3, 1872 |
75 |
| 20. |
METALLIC PROMINENCES IN VORTEX MOTION |
76 |
| 21. |
FOUNTAIN-LIKE METALLIC PROMINENCES |
76 |
| 22. |
QUIET PROMINENCES OF SMOKE-COLUMN TYPE |
77 |
| 23. |
QUIET PROMINENCES, SHAPE OF A TREE |
77 |
| 24. |
DIAGRAM ILLUSTRATING THE DIFFERENCES IN THE SPECTRA
OF SUN-SPOTS AND OF THE PHOTOSPHERE |
78 |
| 25. |
SPECTRUM OF A SUN-SPOT, THE CENTRAL BAND BETWEEN
THE TWO PORTIONS OF THE PHOTOSPHERE SPECTRUM |
78 |
| 26. |
THE GREAT SUN-SPOT OF OCTOBER 9, 1903 |
79 |
| 27. |
THE GREAT SUN-SPOT OF OCTOBER 9, 1903 |
80 |
| 28. |
THE GREAT SUN-SPOT OF OCTOBER 9, 1903 |
81 |
| 29. |
THE GREAT SUN-SPOT OF OCTOBER 9, 1903 |
82 |
| 30. |
PHOTOGRAPH OF THE SOLAR CORONA OF 1900 |
83 |
| 31. |
PHOTOGRAPH OF THE SOLAR CORONA OF 1870 |
84 |
| 32. |
PHOTOGRAPH OF THE SOLAR CORONA OF 1898 |
85 |
| 33. |
PHOTOGRAPH OF ROERDAM’S COMET (1893 II.), SUGGESTING
SEVERAL STRONG NUCLEI IN THE TAIL |
100 |
| 34. |
PHOTOGRAPH OF SWIFT’S COMET (1892 I.) |
101 |
| 35. |
DONATI’S COMET AT ITS GREATEST BRILLIANCY IN 1858 |
102 |
| 36. |
IMITATION OF COMETS’ TAILS |
104 |
| 37. |
GRANULAR CHONDRUM FROM THE METEORITE OF SEXES.
ENLARGEMENT 1 : 70 |
109 |
| 38. |
ARCH-SHAPED AURORÆ BOREALIS, OBSERVED BY NORDENSKIOLD
DURING THE WINTERING OF THE VEGA IN
BERING STRAIT 1879 |
124 |
| 39. |
AURORA BOREALIS, WITH RADIAL STREAMERS |
125 |
| 40. |
AURORA WITH CORONA, OBSERVED BY GYLLENSKIÖLD ON
SPITZBERGEN, 1883 |
126 |
| 41. |
POLAR-LIGHT DRAPERIES, OBSERVED IN FINNMARKEN, NORTHERN
NORWAY |
127 |
| 42. |
CURVE OF MAGNETIC DECLINATION AT KEW, NEAR LONDON,
ON NOVEMBER 15 AND 16, 1905 |
138 |
| 43. |
CURVE OF HORIZONTAL INTENSITY AT KEW ON NOVEMBER
15 AND 16, 1905 |
139 |
| 44. |
ZODIACAL LIGHT IN THE TROPICS |
146 |
| 45. |
SPECTRUM OF NOVA AURIGÆ, 1892 |
154 |
| 46. |
DIAGRAM INDICATING THE CONSEQUENCES OF A COLLISION
BETWEEN TWO EXTINCT SUNS |
157 |
| 47. |
SPIRAL NEBULA IN THE CANES VENATICI |
159 |
| 48. |
SPIRAL NEBULA IN THE TRIANGLE |
161 |
| 49. |
THE GREAT NEBULA IN ANDROMEDA |
163 |
| 50. |
RING-SHAPED NEBULA IN LYRA |
164 |
| 51. |
CENTRAL PORTION OF THE GREAT NEBULA IN ORION |
165 |
| 52. |
NEBULAR STRIÆ IN THE STARS OF THE PLEIADES |
167 |
| 53. |
NEBULAR STRIÆ IN THE SWAN |
169 |
| 54. |
NEBULA AND STAR RIFT IN THE SWAN, IN THE MILKY WAY |
171 |
| 55. |
GREAT NEBULA NEAR RHO, IN OPHIUCHUS |
172 |
| 56. |
STAR CLUSTER IN HERCULES |
173 |
| 57. |
STAR CLUSTER IN PEGASUS |
175 |
| 58. |
CONE-SHAPED STAR CLUSTER IN GEMINI |
176 |
| 59. |
COMPARISON OF SPECTRA OF STARS OF CLASSES 2, 3, 4 |
185 |
| 60. |
COMPARISON OF SPECTRA OF STARS OF CLASSES 2, 3, 4 |
186 |