xiv LIST OF ILLUSTRATIONS.

PAGE

86. Saturn , drawn by Mr. Wray, Dec. 26th, 1861 . 371

87. Saturn’s Rings seen from the Planet —their Effect in froducing

Eclipses of the Sun.37!)

88. Latitudes upon Saturn from which its Rings are Visible ... 383

39. Transit of Titan, Dec. 9th, 1877 . 391

90. Representation of a Change of Inclination of 98° in a Planet ’s

Axis.404

■91. A Change of Inclination of 82° in the Opposite Direction ... 406

•92. Illustration of the Perturbation of Uranus by Neptune ... 411

93. Perihelia of the Orbits of Jupiter , Saturn , Uranus , and Nep­ tune between the Years 1876 and 1887 419

■94. Comparative Sizes of the Sun and the Planets .426

PLATES AND WOODBURY PRINTS.

1. Chart of Mars , by Mr. N. E. Green .

Frontispiece

2. Solar Prominences . ■.

. To face page

32

3. Sun Spots and Faculte.

• »

35

4. The Corona during a Total Solar Eclipse .

• »

43

5. Photograph of the Moon , by Mr. L. M. Rutherfurd

jj

49

6 . The Lunar Mountain Copernicus .

• ?>

72

7. Drawings of Mars in 1877, by Mr. N. E. Green

• )>

240

8. Drawings of Jupiter in 1878, by Mr. G. D. Hirst

• 5)

305

.9. Saturn , drawn by Mr. L. Trouvelot .

* 33

369