Index 



367 



The Figures refer to the sections. 



Planets, 126 et seq. 



Plants, 396, 399, 404, 417 



Pleistocene rocks, 352 



Pliocene rocks, 350 



Polar currents, 245 ; seas, 234 



Polarity, 79, 88 



Pole star, 90, 137 



Poles, of the Earth, 88 ; magnetic, 

 98 ; of a magnet, 79 



Post Tertiary, see Quaternary 



Prairies, 367, 406 



Precession of trie equinoxes, 115 



Pressure, and change of state, 72 ; 

 of atmosphere, 147; and sea- 

 water, 226 



Primary rocks, 346-348 



Probability, 15 



Prominences (solar), 116 



Proteids, 399 



Protoplasm, 398 



Pteropod ooze, 274 



Pumice, 294 



Pyrenees, 385 



QUARTZ, 30, 41 

 Quaternary rocks, 351 



RACES of man, 422-427 



Radiant energy, 60 



Radiation and absorption, 63 



Radiolarian ooze, 273, 276 



Rain, 169, 312 



Rain-band, 160 



Rainfall, 200, 318 ; of world, 



201 ; of British Islands, 204 

 Raised beaches, 284, 352 

 Reason, 8 



Reaumur scale, 440 

 Red Clay, 277, 278 

 Red Sea, 279, 373; circulation, 



237; temperature, 233, 236 

 Reflection and refraction, 61 

 Refraction, atmospheric, 150 

 Religion, 420 

 Rhine River, 386 

 Rhone River, 386 

 Rivers, 318-331 ; water, 221 



" Roaring Forties," 180 

 Roches Moutonndes, 338, 351 

 Rock-basins, 332, 338, 339 

 Rocks, 285, 287-290 

 Rocky Mountains, 364 

 Roraima, Mount, 312 

 Rotation of the Earth, 87, 93, 94 ; 

 of the Moon, 102 



SAHARA desert, 377, 406 



Saima, Lake, 388 



St. Anthony Falls, 330 



St. Elmo's fire, 172 



St. Lawrence River System, 369 



Salinity of the ocean, 223, 224 



Salt Lakes, 335 



Salts, 44 ; of river -water, 221 



of sea-water, 222 

 Sargasso Sea, 246 

 Saturn, 127, 130 

 Scale of maps, 445 

 Science, 3 



Sciences, scope of, 21, 22 

 Scientific method, 9, 18 

 Scoriae, 294 

 Scotland, 390 

 Seas, classes of, 215 ; level, 252; 



water, 222-227 

 Seasons, 120-123 

 Secondary rocks, 349 

 Sedimentary rocks, 288, 304, 



345-35 1 

 Seiche, 239 

 Seismometers, 301 

 Selvas, 361, 407 

 Senses and their use, 7 

 Shoals, 262 

 Shooting-stars, 134 

 Sidereal time, 94, in 

 Sierra Madre, 364 ; Nevada, 



364 



Siliceous organisms, 273 

 Silurian rocks, 346, 390, 391 

 Simoom, 209 

 Slopes of continental edges, 263 ; 



of land, 356 

 Snow, 170 



