
CONTENTS. 
—_~1-—— 
PAGE 
INTRODUCTION Re rye eo et Sey lh ihe ii ce be 1 
BOOK I. 
CosmiIcAL ASPECTS OF GEOLOGY, 6. 
J. RELATIONS OF THE HARTH IN THE SOLAR SYSTEM .. .. «we « 7 
MENT CAND OIA OK THR HARTH .. sss se ee)i~ee 08 ee 11 
Ill. MovEMENTS OF THE KARTH IN THEIR GEOLOGICAL RELATIONS Be 13 
1, Rotation, 13—2. Revolution, 14—3. Precession of the Equinoxes, 14— 
4, Change in the obliquity of the Ecliptic, 15—5. Stability of the 
Earth’s axis, 15—-6. Changes of the Earth’s centre of gravity, 18— 
7. Results of the Attractive Influence of Sun and Moon on the Geo- 
logical Condition of the Earth, 19—8. Climate in its Geological 
relations, 21. 
BOOK II. 
GEOGNOSY—AN INVESTIGATION OF THE MATERIALS OF THE 
EARTH'S SUBSTANCE. 
Part I—A GenerAt DesorIPTION OF THE PaRTs OF THE EHARTH. 
I, Tot ENVELOPES Me 4 iteaeliauey DEY 30 
t. The ee 30: 2. The Ooenns, 32. 
Re Tan Setrp GLOBE-.. .. plies bine 3D 
1. The Outer Surface, 35—2. The Ge 433, The ‘chide or eee 
43: Evidence of Internal Heat, 45; Irregularities in the downward 
Increment of Heat, 47 ; Probable Condition of the Earth’s Interior, 49 
—4, Age of the Earth and Measures of Geological Time, 54. 
Bir II.—An Account oF THE CoMPOSITION OF THE aiaa’s Crust— 
MINERALS AND Rooks. 
I, GENERAL CHEMICAL CONSTITUTION OF THE CRUST apt ibee as Meee 56 
JI. Rock-rorminc MINERALS. aOR YR et aL OR Neem Re Mine, oats M: 60 
ET: GENERAL orn MacroscorPic yore oF Rocks Peay Bee Mieke 86 
1. Structure, 86—2. Composition, 90—3. State of Aggregation, 91— 
4, Colour and Lustre, 91—5. Feel and Smell, 93—6, Specific Gravity, 
93—7. Magnetism, 93. 
TV. Mrnure or Microscopic Coaracters of Rocks... .. .. « « 94 
1. Microscopic Elements, 94—2. Microscopic Structures, 102. 
