CONTENTS. xi

Page

The moon’s phases .141

Varying position of the new moon’s horns ... . 142

Bate at which the moon waxes and wanes . 145

Moon ’s varying path on the heavens.148

Harvest moon and Hunter’s moon ... ... ... ... 151

Effects of the inclination of the moon’s path to the ecliptic 158

•Effects of the eccentricity of the lunar orhit 164

Effects of the motion of the nodes and perigee . 166

Moon ’s rotation ... . ... ... ... 168

Experiments illustrative of moon’s rotation ... ... ... 171

Lunar libration in latitude .173

Libration in longitude.177

Effects of these librations combined.182

Diurnal libration ... . . ... 191

Extent of lunar surface swayed into and out of view by

libration ... ... . ... ... ... 193

The moon’s physical libration ... ... ... ... 199

Shape of the moon’s globe .200

CHAPTER IV.

Study of the Moon’s Surface.

Introduction ... ... . ... ... ... 206

Views of Thales, Anaxagoras, the Pythagoreans , &c. ... ib.

Observations of Galileo .209

Work of Hevelius ... ... ... .. ... 214

Eiccioli, Cassini, Schrbter, and Lohrman . 215

Beer and Madler ... ... ... . ... 218

Webb, Schmidt, Birt, &c. ... ... ... ... ... 219

Lunar photography . ... ... ... ... 223

The moon’s total light compared with sunlight . 231

Variation of light with phase ... ... ... ... ... 233

Moon ’s albedo, or whiteness ... ... ... ... ... 236

Brightness of different parts of moon ... ... ... 240

Changes of brightness ... ... ... ... ... ... ib.

Conditions under which moon is studied ... ... ... 241