Index 



363 



The Figures refer to the sections. 



Colour, 64 

 Columbia River, 364 

 Comets, 132, 133 

 Common-sense, 9 

 Comparison, 4 

 Compass, mariner's, 438 

 Compounds, 42 

 Compressibility, 35 

 Condensation, 70-73, 159, 166 

 Conduction, 59 

 Conductors of electricity, 77 

 Configuration and climate, 186 

 Congo, 269, 319, 326, 376 

 Conical projection, 445 

 Continental Area, 255, 354-392 

 Continental Shelf, 263, 264, 267 

 Continents, evolution of, 353 ; 



statistics of, 355 

 Contour-lines, 446 

 Convection, 68 

 Coral Islands, '280-282 

 Coral mud and sand, 272 

 Corals, 279 

 Corona, solar, 116 

 Cosmic dust, 161, 277 

 Cotswold Hills, 391 

 Counter equatorial currents, 243, 



247, 248 



Cretaceous rocks, 349, 391 

 Crevasses, 337 

 Crystals, 30 

 Cumulus cloud, 168 

 Currents of the ocean, 242-249 

 Curvature of the Earth, 81 

 Curves, use of, 444 

 Cyclones, 206-208 



DAILY range of temperature, 1 82 ; 



of pressure, 183 

 Dalton's Law, 155 

 Danube River, 331, 386 

 Day, longest, 124 ; period of, 



94 



Dead Sea, 333, 335 

 Declination, magnetic, 98 

 Deductive reasoning, 17 

 Deep-sea soundings, 443 



Definiteness, n 



Degradation of energy, 75, 435 



Degree, angular, 31 ; of latitude, 

 92; of longitude, 97; of tem- 

 perature, 440 



Deltas, 325 



Density, 29 ; of air, 148 ; of the 

 Earth, 85 ; of sea- water, 223 



Denudation, 305 



Deposits in the ocean, 268-277 



Deserts, 406 



Devonian rocks, 346 



Dew, 165 



Diatom ooze, 273, 276 



Differential attraction, 103 



Dip of horizon, 81 ; of a magnet, 

 98 ; of rocks, 290 



Direction on the Earth, 91 



Disruptive discharge, 78 



Distance of stars, 137 



Distribution of animals, 409 ; of 

 mankind, 427; of plants, 410 



Doldrums, 179 



Dolphin Ridge, 258 



Drainage areas of ocean, 356 



Dust, 134, 151, 161, 162, 297 



Dykes, volcanic, 295 



EARTH, the, 81 et seq.\ and 



Moon, 104; orbit, 109 

 Earthquakes, 299-301 

 Eclipses, 113 

 Ecliptic, 112 

 Elasticity, 35 ; of Earth's crust, 



299 



Elbe, river, 386 

 Elburz Mountains, 379 

 Electrical energy, 76 

 Electrification of the atmosphere, 



172 



Electro-magnetism, 80 

 Elements, 45 

 Elevation and subsidence of land, 



284 

 Energy, 25, 49, 53-56, 60, 163, 



250, 283, 304, 305, 399, 435 

 England, 391 



