The moon, and the condition and configurations of its surface

Front matter

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Chapter I. Motions, Figure, And Dimensions Of The Moon

PAGK

Introduction , . . . . . .1

General Nature of tlie Moon's Orbit .... 2

Elements of the Lunar Orbit . . . . .4

Principal Inequalities in its Motions . . .5

Figure and Dimensions of the Moon . . . .10

Selenographical Co-ordinates ..... 13

Lunar Librations . . . . . . .13

Chapter II. The Physical Condition Of The Lunah Surface

General Condition . . . . . .17

Lunar Atmosphere . . . . . . .19

Evidence of its Existence ..... 30

Temperature of the Surface of tbe Moon . . . .30

General Appearance of the Moon's Crust . . .42

Nature of the Principal Formations . . . ,44

Chapter III. The Lunar Formations

General Classification ....

The Bright and Dark Plains

. 52

The great Crater-like Formations

The Craters of the Moon .

. 62

The Lunar Mountains ....

The Hills or Clefts

. 71

Scales of Brightness ....

The Ray or Streak Systems

. 76

Peculiarities of Colour ....

Xll

CONTENTS.

Chapter IV. Lunar History

PA OK

Daring the Earliest Periods . . . . .80

During the Grecian Period . . . .81

Hipparchus and Ptolemy . . . ... .83

Medieval Epoch . . . . . .84

Galileo, Heyelius, Riccioli, Cassini, and Newton . . .85

Progress of the Lunar Theory. Euler. D'Alembert. Clairaut. 89 Investigation of the Moon's Librations. Mayer. Lagrange.

Advance of Selenography. Scbroter . . . .94

Lunar Theory. Laplace. Burg. Damoiseau. Plana . . 97

Libration. Poisson. Bouvard. Nicollet . . .98

Lohrmann's Sections ...... 100

Beer and Madler . ' . . . . 101

Real Libration. Wichmann ..... 105

Lunar Theory. Lubbock. Pontecoulant. Hansen. Delaunay 100 British Association Map and Catalogue .... 107

Schmidt's Map ....... 109

Present Position of Selenography ..... 110

CHAPTER V. Physical Changes on the Moon

Changes of a certain class unquestionable Effects of Variation of Illumination Alterations due to the Lunar Librations Effects on the Study of the Surface Variation in Appearance of Linne .

Apparent Alteration in Messier Variations in Brightness and Tint .

Werner and Plato ; instances of this . Vegetation on the Moon

Ill

. 113

. 119

. 123

. 127

. 129

Description of Map XXII. . . . . . .503

CHAPTER XXIX. Apparent Co-ordinates of the Moon .... 521

Selenographical Elements ..... 531

Selenograpliical Elements : Auxiliary .... 536

Selenographical Positions ..... 542

Selenographical Dimensions . . . . .554

Table I.

Value of Auxiliary Quantities required for the Computation of the

Moon's Librations ...... 564

Table II.

Points of the First Order, with their Positions and Co-ordinates . 565

Table III.

Lunar Elements . . . . . . .567

Synopsis of the Selenographical Formula . . . 569

Alphabetical Index to the Formations .... 571 General Index . . . . . .575

ILLUSTRATIONS.

DRAWINGS.

No.

1. Copernicus. Day after Sunrise . . . Frontispiece

2. Agrippa and Go-din. Sunrise . . . To face page 161

3. Agrippa and Godin, under Meridional Illumination „ 162

4. Plato. Soon after Sunrise . . . „ 245

5. Plato. Two Days before Full . . „ 246

1. Gassendi .

2. Maginus

3. Theophilus

SPECIAL MAPS.

422 499

MAPS.

Key Map

Map I.