LIST OF ILLUSTBATIONS.
1. A WELL-CONDITIONED Triangle . 3
2. Ax Ill-conditioned Triangle. 3
3. Traxsit of Venus , 187-1—Ingress am seex at Rodriguez . 10
A » i, ' „ IXGRESS AS SEEX AT KERGUELEN ’S LaXD ... 10
■">• ■, „ „ Egress as seex ix Egypt . 10
fi. Distance traversed nr Light from Jupiter to the Earth ... 14
7. Sux Spots seex as Depressions ix the Photosphere. 21
8. Form of a Solar Pro.mixexue ixdicated by Bright Lines. 30
9. First Solar Promixexue seen by Dii. Huggixs with a widely-
opened Slit . 30
10. Curves of Sun -spot Frequency and Magnetic Force . 39
11. The Moon ’s Path curved by the Earth and by the Sux. 58
12. The Moon’s Orbit always Concave to the Sun . 61
13. Path of the Moon seen from the Earth . 61
14. False representation of the Moon’s Orbit . 62
16. One-fourth of the Moon ’s Surface seen as a Semicircle
19. The Great Crater of Teneriffe ...
20. Line of Nodes of the Moon ’s Orbit passing through the Sun
21. Eclipse of the Moon —its Maximum Duration.
22. The Full Moon escaping Eclipse .
23. The Moon nearer in the Zenith than in the Horizon
24. Path of Mercury relatively to the Earth , by Cassini
25. Apparent Paths of Jupiter and Saturn .
26. Apparent Path of Mercury in 1881 and 1882 ...
27. ,, „ Venus , Feb. 1881 to Feb. 1883
29. Cycles and Epicycles of Venus and Mercury ...
30. „ „ Mars , Jupiter , axd Saturn
31. Time occupied by Jupiter in Oxe Loop of its Apparent Orbit
32. Cycle and Epicycle, showing the Description of the Apparen
34. Ellipses of Different Degrees of Ovalness
35. Kepler’s Second Law .
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