INDEX 



23 



References are to pages 



Surface Continued 



cycles of change .... 303 

 interior conditions of, 249, 502-521 

 pressure vs. temperature 



502-503, 520-521 



volcanic action . . . 504-521 



earthquakes . . . 513-515 



faults 514 



geysers . . . 511-513,521 



islands 509-511 



volcanoes : 



distribution of . . 508-511 



Monte Nuovo 504,506,521 



Mt. Pelee . 506-508, 521 



Vesuvius . . 504-506,521 



life (of animals, man, plants) 



in relation to . . 166,277-279, 



522-553 



mineral deposits of ... 515-521 

 coal, copper, gold, iron, 



silver 516-519 



peat 517-518 



petroleum and other oils, 519-520 



veins of minerals .... 515 



original condition of 247, 275, 278 



structure of 255-274 



Suspension of matter in water . 142 



Swamps 174 



Swarm (bee-colony) .... 404 

 Swell (in ocean) 155 



Tantalum 488 



Taste (sense of) 413 



Teeth 420 



Telegraph 492-494 



invented by Morse . . . 492, 494 



key of 493-494 



sounder 493-494 



wireless 495 



Telephone. ...'... 495 



Telescope (lenses of) .... 356 



Temperature .... 11,72-94, 



100-102, 106-109, 136-138, 142, 



156-157, 211-213, 227-228, 248, 281 



a factor in surface-changes . 281 



air vs 107-109 



evaporation vs. 100-102, 106-107 

 graphic method of showing 

 records of . 213 



Temperature Continued 



heat vs 72-94 



specific heat 84 



measurement of ... 80-82, 94 



thermometers . . 80-82, 93-94 



of ocean waters . . 156-157, 213 



of planets 11 



of salt solutions 142 



pressure vs 136-138, 



211-213, 227-228, 248, 502 

 vs. depth within earth . 248, 502 

 vs. distance from sea . . 213 



vs. height 212 



vs. latitude 211 



vs. soil 212 



vs. storms 227-228 



vs. water 136-138 



Terraces, river 186 



Terrestrial winds . . . ,221, 245 

 Texas fever (bacterial disease) 454 

 Thermometer . . . 80-82,93-94 



scales of 81-82 



Centigrade . . . 81-82, 93-94 

 Fahrenheit .... 82, 93-94 



formulae 93 



Thorax (of man) .... 409-410 



Throat 408 



Thundersqualls ; see Thunder- 

 storms 

 Thunderstorms . . . 229-230, 245 



cause of 229-230 



Tick (carrier of disease) . . . 454 

 Tides (of ocean) . 17-19, 164-166 

 eddies, tidal undulations, 



whirlpools 165 



Antwerp, Hell Gate, Mael- 

 strom . 165 



influence of moon upon 17, 19, 165 

 influence of sun upon . . . 165 



" slack water " 164 



varieties of 164-166 



ebb tide 164, 166 



flood tide 164 



neap tide 165 



spring tide 165 



Tillage ; see Cultivation 

 Time . 24, 26, 34-35, 37, 40, 248 

 in formation of earth . . . 248 

 International Date Line . 35, 40 



