426 



INDEX 



Camera (Continued) 



shutter 144 



what makes some expensive 145 

 Candy, as a food .... 316-317 



Capillaries 383 



Capillarity 238 



Cartilage, where joined . . . 371 



uses of 371 



Caterpillars 274 



Cassiopea 203 



Catbird 279 



Cavendish 82 



Cells .... 353, 354, 356-357 

 body built of . . . .353,354 



electric 178,179 



free living 357 



how food gets to .... 381 



from tissues 357 



of onion 254 



of nervous system .... 385 



release energy 354 



Century of Progress . . . . 192 



Changes, chemical and physical 15 



Chaparral 289 



Characteristics of living things 



252-257 



Cheerfulness, as a habit . . . 390 



Chemical change 15 



Cigarette smoke, effects on fish 393 



Clam, salt water 295 



Clothing, and body heat . . 117 



extremes in 118 



for summer 120 



for winter 120 



materials used for . . . . 117 



Collecting trip, outfit for . . 282 



preparation for 281 



shore 294 



Color blindness 156 



Color, what it is 154 



Colored objects 155 



Colors of stars 193 



Compass, how to make a . . 168 



how to use 168 



value of 171 



Compounds 14 



Condensation 84 



Conduction 110 



Constellations 202, 203 



named by Greeks . . .201, 202 



Conductors 177 



Conifer 271 



Control 337 



nervous 386 



Convection 109 



currents 109 



Copernicus 188, 189 



Corolla 263 



Corpuscles, colorless .... 381 



red 381 



Cosmetics, use of 363 



Crabs 296 



Crickets 274 



Cross pollination 263 



Crustaceans 276 



crayfish 286 



Current electricity . . . . 178 



Daguerre . 143 



Dairy, a model barn .... 340 

 Day, a 7th grader's .... 390 



Decay, cause of 334 



Deciduous trees . . 270, 271, 272 



Dermis 361 



Desert, before and after rain 80, 81 

 Digestion, demonstration to 



show 377 



organs of 378 



work of enzymes . . . 378-379 

 Dipper, Big . . . . 201, 202, 203 



Little 201, 202, 203 



Distances to stars 191 



Downing 287 



Dry ice 343-344 



temperature of 344 



uses of 344 



Drowning, first aid .... 403 



Earth, age of 222 



movements of .... 196-198 



Earthworm 276 



Egg 263-264 



Electric cells 178-179 



Electric energy, produced 



chemically 179 



shock, first aid 404 



Electrified bodies, properties 



of 175-176 



Electricity, current ... 178 

 ways of producing . . . 173-179 



Elements 14 



Elfin forest 289 



Elm 271,272 



Emetic 407 



Emulsion 91 



Enzymes 378-379 



Endocrine glands 387 



Energy 14 



from fuel 352 



English sparrows 280 



Environment 



differences in . . . . 17-18 



factors of 1 1 , 12 



life depends on 255 



use of 16 



