Index 



613 



Cast iron, 441, 451 



Cavendish, 117 



Cellulose, 520 ff. 



Cement, 419, 426 ff. 



Center, of buoyancy, 345, 351 



of gravity, 344 ff., 349, 399 

 Centigrade scale, 87 ff. 

 Cerium, 160 

 Cesspool, 214 



Charcoal, 81, 129, 138, 145 

 Cheese, molds in, 553, 554 

 Chemical change, 59 ff., 109, 131, 139 



energy, 109 



Chemistry and industry, 418 ff., 438 

 Chicago water supply, 192 

 Chlorid of lime, 583 

 Chlorine, 545, 583 

 Chlorophyll, 515 

 Chloroplasts, 515, 516, 521 

 Cholera, 208, 217, 577 

 Chronometer, 376 ff . 

 Cirro-stratus clouds, 28 

 Cisterns, 197, 548 

 Citric acid, 129 



Clay, 407, 414, 420 ff., 427, 456 

 Climate, 1, 2 ff. 

 Clinical thermometer, 88 

 Close-pollination, 488 ff., 495 

 Cloud, 28 ff., 44, 50, 55 

 Cloudburst, 36 ff. 

 Coal, 129, 132, 136 ff. 



anthracite, 414, 415 



bituminous, 138, 144, 163, 414 ff., 

 445 



distillation of, 163 



economy of, 127, 235 ff., 271, 295, 

 303 



gas, 163, 445 



heat value of, 142 ff., 144 



supply of, 234 



tar, 164 ff., 406 

 Coke, 128, 138, 144, 163 

 Cold storage, see Refrigeration 

 Color and eye-hygiene, 177, 182 



of flowers, 491, 495 



of objects, 179 

 Combustion, 59, 69 ff., 80, 113 ff., 125, 



138 



Commerce of Great Lakes, 385 ff. 

 Commutator, 322, 325 

 Compass, 370 ff. 

 Composition of forces, 360 ff. 



Compound engines, 310 ff. 



substance, 113, 130, 139 

 Compressor pump, 151, 154 

 Concrete, 419, 427 

 Condensation, 306 



effect on climate of, 35, 306 

 Condenser, steam, 295 ff. 

 Conduction of heat, 93 ff., 104, 111 

 Conductivity of substances, electric- 

 ity, 167 ff., 449 



heat, 95, 111, 167 

 Conductor, heat, 94, 104, 111 

 Convection, 96 ff., Ill 



currents, 65, 102, 111 

 Cooper-Hewitt lamp, 178 ff. 

 Copper, 168 ff., 176 

 Corn, 487 ff. 

 Corolla, 483, 494 



Cross-pollination, 488 ff., 495, 503 

 Crucible steel, 446, 451 

 Crushing force, 282 



strength, 282, 431 

 Crystals, formation in rock, 408 ff. 

 Culex mosquito, 524 ff., 536 ff., 545 

 Cultivation of soil, necessity for, 475 

 Cumulus clouds, 28 

 Curves, in roads, 274, 278 

 Cuttings of plants, 499 ff., 503 

 Cyclone, 20 ff., 33, 50 



Dams, 200 



Decay, 213, 552 



Declination of magnetic needle, 372 ff. 



Dengue fever, 532, 543 



Density, 342 ff., 351, 392 ff. 



Desert land, reclamation of, 203 ff. 



Dew, 48, 52 ff. 



point, 48 ff., 55 

 Dextrine, 560 

 Diamond, 128 



Diastase, 518 ff., 521, 567, 569 

 Diesel engine, 368 

 Digestion of starch by plants, 518, 519, 



521 



Digestive ferments, 518 ff., 521, 553 

 Diphtheria, 532, 594, 602, 606 ff. 

 Dirigible balloon, 393 ff. 

 Disease, control of, 523, 531 ff., 588, 



591, 603 

 causing bacteria, 217, 548, 570, 



592 

 of plants, 554 



