26 



EVERYDAY SCIENCE 



References are to pages 



Weather Continued 



barometric pressure . 217 

 deflection of ... 217-220 

 warming of atmosphere 



209-213, 244 



altitude vs 212 



clouds as heat-containers 



210, 244 

 insolation .... 209-210 



latitude vs 211 



soil vs 212-213 



Weathering (of rocks) . . 279-281 



Wedge 469 



Weight 66,94 



Weight arm (in lever) . . . 464 

 Welding (by electricity) ... 487 



" Westerlies " 224 



Whirlpools 165 



Whooping-cough (bacterial dis- 

 ease) 442 



Winds. . .110,125,162-164,213, 



215-231, 244-245, 279, 281-285, 



470, 472 



adiabatic cooling and heat- 

 ing, a cause of . . . . 125 

 affected by ocean-currents, 



162-164 

 as carriers of deposition . . 285 



Wind Continued 



as causes of surface-changes 



281-285 



as transformers of energy . 470 

 as weathering agency . . . 279 

 barometric pressure vs. . . 217 

 circulation of air 



110,215-216,244 



deflection of 217-220 



direction of 217 



Fen-el's law 219 



planetary wind belts 220-228, 244 



terrestrial 221, 245 



storms 224-228,245 



Winds, trade 221 



Wireless (telegraph and tele- 

 phone) 495 



Wood ashes (fertilizer) ... 317 



Worms (invertebrates) . . 401-402 



earthworm 401-402 



Yeasts .... 303, 399, 422, 437 

 buds of 399 



Yellow fever (protozoan dis- 

 ease) 401,452 



Yellowstone Park (geysers of) . 511 



Zodiac 



9 



