432 



INDEX 



in waste products, 325 



skin as a protection against, 

 359 



useful b., 103, 247 

 Bacteriology, definition of, 243 

 Barometer, 134 

 Bases, 106 

 Bile, 319, 324 

 Birds, 257 

 Bladder, 358 

 Blade, 200 

 Blizzards, 142 

 Blood, 334 



amount of, 337 



coagulation of, 337 



supply in muscles, 379 



vessels, 334, 342 

 Board of Health, 429 

 Boiling points, 27, 40, 42 

 Bones, cells of, 374 



composition of, 72, 373 



diseases of, 375 



division of, 371 



fracture of, 376 



growth of, 374 



of limbs, 372 



purpose of, 370 

 Botany, 1, 193ff. 

 Brains, of aniirals, 281 



of man, 384, 385, 386, 387 

 Bread-making, 70 

 Breathing, mechanism of, 349 

 Breezes, land and sea, 140 

 Bronchus, 348 

 .Burning, 94 

 Butterfly, development of, 266 



Calorie, definition, 31, 44 



of heat in food, 305 

 Calyx, 233 



Canal, alimentary, 310 



of ear, 406, 408 

 Capillaries, 342 

 Carbohydrates, 203, 204, 301 

 Carbon, kinds of, 60ff. 

 Carbon dioxide, 66, 93, 204 



balance maintained, 68 



commercial uses of, 68, 123 



in air, 66, 68, 121, 123, 351 



in blood, 357 



test for, 67 

 Carpal, 372, 373 

 Cartilage, 373 

 Cast iron, 87, 88 

 Cell, egg and sperm, 283 



of a plant, 196 



of animals, 275 



nerve, 384 

 ' wall, 195 

 Cerebellum, 386 

 Cerebrum, 386 

 Charcoal, 61 

 Chemical, affinity, 58 



analysis, 57 



changes, 52 



compounds, 53, 54 



properties, 53 



synthesis, 57 

 Chemistry, 2, 51ff. 

 Chlorophyll, 202, 203, 201, 301 

 Choroid, 400 

 Chrysalis, 266 

 Circulatory system, 334tf. 

 Circulation in animals, 279 

 (lay, 190 

 Climate, 149, 150 

 Clothing, animals supplying. 

 288 



use of, 365 

 Clouds, 126 

 Coagulation, 337 



