INDEX 



References are to pages 



Energy ... 57, 60-94, 98, 100- 

 107, 137-138, 350, 357-358, 396, 

 399-400, 407-410, 419, 428-430, 

 456, 459-474, 483-484, 501 

 breathing as means of gen- 

 erating 407-410 



by combustion . 72-94, 98, 399, 



419, 428-429, 472, 474 



by evaporation . . . . . 101 



by molecular motion . . 67, 94 



law of 67, 94 



by transference .... 357, 474 



by transformation . 62-64, 72-94, 



357, 470-474 



conservation of 63-64, 462, 473 



control of 57 



evaporation as form of . 100-107 



food as generator of ... 399, 



419, 428, 430, 456 



forms of 60-93, 396 



friction vs. ... 63, 462-463 



" lost energy " . 63, 462-463 

 intensity of ...... 350 



kinds of : 



chemical . . 62,72-94,358, 

 472-473, 501 



electric and magnetic . 72-94, 

 472, 483-484, 501 

 gravitational . 62-63,93,483 

 heat . 61,93,137,357-358,501 

 light .... 61, 93, 357, 501 



mechanical . . . .61, 72-94, 



137-138, 470-474 



laws of 67, 94, 350 



of animals . , . .98, 399, 419, 428 



of plants 399 



power generated by . . 72-94, 



137-138, 470-474, 484, 501 



sun, source of 3, 93, 101, 396, 399 



Epiglottis 408 



Equator 30-31, 39 



Equatorial winds 220 



Erosion 159-161, 186, 



252,278-285 

 by ice . ,. . . .... 285 



by water 278 



by waves 159-161 



by wind 281-282 



sand an agent 282 



Es'tuaries 261 



Ether ........ 105, 361 



Evaporation . . 100-107, 127-128, 



133, 136, 153, 166, 170, 172, 186, 



278, 327-329, 331, 345, 385 



a cause of salt lakes . . . 172 



cooling by 104 



in irrigation 331 



of alcohol 105 



of ammonia gas .... 127-128 



of ether 105 



of gasoline . . . 105, 140, 520 



of water . . 100-107, 136, 153, 



166, 170, 278, 327-329, 345, 385 



moisture in plant-leaves . 385 



rain-water 170 



sea-water 153, 166 



soil-water . . . 327-329,345 



process of 100 



temperature vs 100-106 



Expansion 64-69, 94, 124-125, 136-137 

 Experiments (The experiment- 

 number is in bold face) : 



air 35-43,97-111 



atmospheric pressure . . 4455, 



114-131 



earth's magnetism . . . . 8, 37 



rotation . . / . .4-7,24-33 

 shape ....... 2-3,22 



surface 80-87,248-279, 161, 512 

 electricity . . 152-160,480-493 

 energy . . . 145-146,462-466 

 food . . . 138-144,419-438 



heat 18-34, 64-88 



life animal . 133-137,402-417 



plant . . 108-123,367-385 



seed . . . 124-132,393-396 



light .... 100-107, 347-358 



magnetism . 147-151, 475-478 



matter 9-15,42-55 



changes of . . . 16-17,51-55 

 sky (the heavens) . . . . 1, 8 



soils 88-99, 307-327 



water . , . . 56-74, 135-170 



weather, rainfall . . . 79, 231 



winds . . . 75-78,216-218 



Extension 42,43 



Eye (organ of sight) . 414-416, 423 

 eyelid 414 



