EVERYDAY SCIENCE 



References are to pages 



Coal .... 254-255,516^519 



anthracite 255 



bituminous 254 



mining of 516-519 



story of 516 



Coast, depressed 549 



Coastal plains . 257-264, 274, 546 



see also Plains 



Cold-storage . . 125, 127-128, 134 

 Color .... 356-361, 364, 390 



in light 356 



refraction through prism 356-358 

 spectrum .... 357-358 

 effects of atmospheric 



conditions . . . 357-361 

 spectroscope . . . 358, 364 



of flowers 390 



Combustion 71,97-98 



Comets 18,19 



Halley's Comet 17 



see also Sky 

 Commercial fertilizers ... 316 



see also Fertilizers 

 Compass, mariner's 39, 476-478, 501 



dip of needle 477-478 



corrections for declination . 478 



Conservation . . 37, 40, 63, 74-80, 



90-94, 108, 112-114, 133, 184, 



198-206, 209-210, 307-346, 



362, 430-433, 438-441, 444- 



457, 462, 473 



of energy . . . 63-64, 462, 473 



of food 440-441 



legitimate preservation . 440 

 illegitimate preservation . 441 



of forests 339-345 



of fuels 74-77, 94 



of health .... 99, 108, 112- 



114, 133, 361-362, 430-433, 438- 



439, 443-457 



by cleanliness and sanita- 

 tion 444-457 



disinfection 361-362, 443-445 



sewage 449, 457 



by proper food . . . 455-457 



by ventilation . 99, 112-114, 133 



of heat . . 77-80,90-94,209-210 



fire-control 77-80 



smoke abatement ... 94 



Conservation Continued 



of light 37, 40, 362 



daylight saving and light- 

 less nights . . .37, 40, 362 

 of soils . . . 184,315,322-323, 

 329-332, 334, 339-345 

 by adding and conserving 



soil-water .... 322-323 



by cultivation .... 329, 334 



by draining . . . .331, 334 



by dry farming . . . 329-330 



alternate-year planting . 330 



by fertilizing 334 



by forestry 339-345 



by irrigation .... 330-332 



ditching 331 



flooding 330-331 



by levees 184 



by neutralizing over-acida- 



tion 315 



by prevention of seepage . 331 

 by prevention of -water- 

 logging ...... 331 



by reclamation ; see Rec- 

 lamation 

 see also Soils 

 of water-supply .... 198-206 



Constellations 9-10, 19 



see also Stars 

 Continental shelf .... 256-259 



bars 258 



dunes 258 



islands 256 



lagoons 259 



life on 257 



reefs 258 



see also Land 



Continents .... 248,256-276 

 Contraction (of gases, liquids, 



solids) 65-69,94 



Convection currents . . 88-90, 94 



Coral islands 510,533 



polyps 533 



CorSl'la (of flower) .... 387 



Coro'nas 17,360,365 



Corpuscles (of blood) . 411, 430, 444 



Crane 491 



Craters (of volcanoes) . 503-506, 549 

 Crevasse' (of glaciers) . . . 289 



