INDEX 



Absolute humidity, 255 

 Absolute temperature, 308 

 Accidents to streams, 80 

 Agonic line, 202 

 Agriculture and rainfall, 319 

 Alluvial cone, 84 



deposits, 84 



fan, 84 



plains, 85 



and floods, 92 

 fertility of, 89 



terraces, 98 

 Aldrich Deep, 325 

 Alpine glaciers, 131 

 Altitude and temperature, 238, 

 Aneroid barometer, 263 

 Antarctic circle, 216 

 Antarctic ice cap, 113 

 Anticyclones, 285 



movements of, 289 

 Arctic circle, 216 

 Artesian wells, 32, 36 

 Asteroids, 216 

 Atmosphere, 217 



chemical work of, 25 



constitution of, 221 



density of, 217 



height of, 218 



history of, 219 



impurities in, 221 



mass of, 219 



volume of, 219 



work of, 18 

 Atmospheric elements, 222 



moisture, 251 



pressure, 262 

 Atoll, 346 

 Autumn, 233 

 Autumnal equinox, 213 

 Avalanches, 121 



Bad lands, 75 

 Barometer, 262 

 Barrier beach, 155 

 Barriers, 155 



247 



Base-level, 65 

 Basins, 14 

 Bayous, 88 

 Beaches, 155 

 Blake Deep, 325 

 Beheaded stream, 82 

 Blizzards, 294 

 Bore, 339 



Braided streams, 86 

 Buttes, 80 



Caldera, 175 



California earthquake, 196 



Cancer, tropic of, 216 



Canyons, 73 



Capricorn, tropic of, 216 



Carbon dioxide of air, 221, 222, 223 



of sea, 329 

 Cascades, 76 

 Caverns, 38 

 Cavern life, 39 

 Caspian Sea, 145 



Changes taking place on land, 14 

 Changes of level, 186 

 Charleston earthquake, 193, 194 

 Chemical work of air, 25 

 Chesapeake Bay, 81 

 Chinook winds, 307 

 Circle of illumination, 212 

 Circulation of atmosphere, 272 

 Circulation of sea-water, 333 

 Cirques, 117 

 Cirrus clouds, 258, 259 

 Cliff dwellings, 75 

 Cliff glaciers, 106 

 Cliffs, 9, 14 

 Climate, 308 

 Climate and life, 320 

 Climate, changes of, 320 



continental, 314 

 Climate, littoral, 314 

 Climates, classification of, 310 

 Climatic effect of forests, 315 

 Climatic zones, 310, 312 

 Cloudbursts, 304 



353 



