INDEX 



Bold-face numbers refer to illustrations. 



Accidents, auto 399, 400, 401, 402 



classification of 400 



broken bones 405 



prevention of 402 



to pedestrians 401 



what to do in case of . . 402-407 



Adaptations, acts 35 



cactus 30, 31 



for seed dispersal . . . 31-32 

 for food getting .... 27, 267 



green plant 30-31 



how we make them ... 38 



in birds 28-30, 34 



in fishes 36 



in man 33-35 



what they are .... 26-27 



Air, a mixture 47 



exerts pressure .... 52, 53 



occupies space 45 



pump 62 



supply 67, 68 



uses of 50, 51, 59-66 



Alcohol, effects of . . 388, 397, 398 



food value 316 



harm done by 397 



Amphibia 275 



Animals, adaptation for food 



getting .... 266, 267, 268 

 business of life .... 266-269 



carnivorous 267 



food eaten by 266 



harmful to gardens . . . 274 



herbivorous 267 



on home grounds .... 273 



like machines 267 



reproduction 268-269 



Anthers 263 



Arches, fallen 372-373 



how kept in good condition 



372-373 



Arcturus 192, 203 



Aristotle 2 



Arteries 382 



Artificial respiration, prone- 

 pressure method . . . 403-404 

 Athletics, overstrain in ... 391 



Atlantosaurus 224 



Atomizer 61-62 



Atmosphere, exerts pressure . 46 

 holds things together . 56, 57, 58 

 tapers off 46 



Atmospheric pressure . . 55-56 

 Auto and human machine . 354-358 

 Audubon 278 



Bacteria 333-341, 337 



colonies of 337 



forms of 337 



how we grow 337 



living things 336 



Barnacles 296 



Bath, Roman 88 



Baths, uses of 366-367 



Beebe, William 29 



Beetles 274 



Betelgeuse 203 



Bird bath 280 



Birds 277-280 



attraction of 280 



on home grounds .... 279 



protection of 279 



relation to forest .... 291 



useful 277 



Bleeding, arterial 406 



first aid 406 



from veins 406 



Bones and ligaments .... 370 



and muscles 369 



and tendons 370 



as levers 368 



broken, first aid .... 405 



fractured 369,370 



in foot 372 



Body control, how influenced 387-388 



Boils, cause of 363 



Bomb calorimeter 330 



Brashear, computations . . . 191 

 Breathe, how we ... 69-71, 70 



Brontosaurus 224 



Bugs 276 



Burns, first aid 407 



Butterflies 274 



Calcium in body , . . 322, 323 



Calorie . 329,330 



requirements of body . . 329-331 

 requirements of man . . 329-331 



Calyx 263 



Cambium 292 



Camera 143, 144 



first picture made with . . 143 

 resembles the eye .... 149 



425 



