Part 25

Copernicus, 102, 211. an argument for the volcanic theory, 212. buried ring near, 217-218. crater pits near, 213. hexagonal form of, 212.

Craters, lunar, formation of, ascribed to falling masses, 201. theory of, advanced by W. K. Gilbert, 200.

Cyrillus, 72, 138, 199, 206, 210.

“Dark woman” in moon, 133.

Darwin, Prof. George, 6.

Dawes, 224.

Day and night on moon, 63.

Day on moon, length of, 95.

Earth, light of, on moon, 50. shadow of, effects of, as shown by Prof. William H. Pickering, 28. shadow of, its size and length, 18.

Eclipse, lunar, 17-18. earth’s atmosphere and, 27. moon visible during, 26.

Eclipses, lunar, colors visible during, 29. fix historic dates, 29. number of, in year, 42. when annular, 41.

Eclipses, why they do not occur every month, 38. solar, different from lunar, 27. number of, in year, 42. why of greater scientific value than lunar, 28.

Endymion, 70, 132.

Eratosthenes, 104.

Eudoxus, 76, 138.

Fracastorius, 73.

Fra Mauro, 189.

Full Moon in winter, why it runs high, 170.

Furnerius, 63.

Gases, escape of, from moon, 229. from planets, 33. molecular velocity of, 33, 229.

Gassendi, 117.

Gauricus, 196.

Gay Lussac, 216.

Gemma Frisius, 202.

“Geology” of moon, 67.

“Giantism” on the moon, 193.

Gilbert, W. K., theory of lunar craters advanced by, 200.

Gravitation on moon, 34-36.