CHAPTER PAGE
Introduction, v
Earth.
I. World-Building and Life, 1
II. Limestone, 12
III. Coal, 22
IV. Slate and Shale, 31
V. Salt, 36
Air.
VI. The Atmosphere, 42
VII. Air Temperature, 51
VIII. Cloud Formation, 60
IX. Cloud Formation (Continued), 69
X. Wind—Why It Blows, 79
XI. Wind (Continued), 88
XII. Local Winds, 100
XIII. Weather Predictions, 110
XIV. How Dew Is Formed, 115
XV. Hailstones and Snow, 124
XVI. Meteors, 129
XVII. The Sky and Its Color, 134
XVIII. Liquid Air, 146
Water.
XIX. Rivers and Floods, 152
XX. Tides, 161
XXI. What Is a Sponge? 167
XXII. Water and Ice, 177
XXIII. Stored Energy in Water, 182
XXIV. Why Does Ice Float? 192
XXV. Glaciers, 198
XXVI. Evidences and Theories of an Ice Age, 207
XXVII. Glacial and Preglacial Lakes and Rivers, 217
XXVIII. Some Effects of the Glacial Period, 230
XXIX. Drainage before the Ice Age, 239