My reasons for dwelling earnestly on the points at issue (foot-note) 443 Suggestions for applying the direct parallactic method Tables referring to stations for observing transit of 1874:- Subject of eclipses inadequately treated in text-books Eclipse-limits Varying presentation of revolving circle (foot-note) ILLUSTRATIONS. PLATES. I. Part of the solar disc (coloured) III. Six views of the eclipsed Sun (coloured) . To face page 177 To face page 273 V. Two views of a prominence by Zöllner (coloured) 304 307 308 343 To face page 439 IX. The transit of 1874, ingress To face each other between pages X. egress f WOODCUTS. 440, 441 4. Illustrating measurement of Moon's distance 5. Aristarchus' method of measuring Sun's distance 6. Hipparchus' 7. Diagram 8. Orbits and conjunction-lines of Mars and the Earth 9. Measurement of Mars's distance 33. The author's double automatic twice-acting battery 34. Prismatic analysis of the Sun's surface 38. How the spectroscope makes prominences visible 39. Spectroscopic exhibition of motions of recess or approach . 135 135 136 . 137 138 (tangential slit) 171 . 179 180 . 190 . 219 . 220 . 221 . 222 46. Varying presentation of solar spot-zones 47. Sun-spot showing Nasmyth's willow-leaves 48. Large spot-group showing willow-leaves (Nasmyth) 58. Prominences seen during the eclipse of 1851 (Airy) 247 64. Chandelier prominence seen in 1860 (Goldschmidt) 67. 68. Illustrating distribution of prominences (Gray) . 247 (Stephenson) . 247 . 268 70. Eclipsed Sun, August 1868, photographed at Aden 71. Spectrum of prominence and of solar limb . 275 . 287 72. Widening of the hydrogen F-line in prominence-spectrum 73. Spectroscopic indications of solar cyclones 75. The first prominence seen by aid of spectroscope (Huggins) 78. Prominences seen during American eclipse (1869) 81. The corona in 1858 (Liais) as photographed by Secchi in 1860 . 296 . 299 . 301 . 302 . 303 . 311 . 317 . 324 . 326 . 327 330 . 334 theory' 87. The Milky Way as a spiral 88. Motion of the Earth's orbit through space 89. Earth's motion through space 90. Proper motions of stars in Ursa Major, &c. 19 head of Aries 92. Diagram illustrating transits of Venus 94. Explaining Plate VIII. 351 358 |