614 



Index 



Disease, prevention of, 592 ff., 605, 608 



transmission of, 187, 207, 523, 

 532 ff., 548, 589 



resistance to, 591 ff. 

 Disinfectants, 583, 586 

 Disinfection, 597, 598 ff . 

 Distillation, 313 ff. 



destructive, 155, 157, 163 



fractional, 314 

 Division, in propagation of plants, 



499, 503, 551, 563, 577 

 Doldrums, 31 



Dominant characters, 507 ff., 513 

 Draft, 65 ff. 

 Dry cell, electric, 332 

 Dust in air, 197, 546 ff . 

 Dysentery, 217, 571 



Eccentric, 294 



Efficiency of machines, 243 ff., 249, 



272, 363 



Ehrlich's theory of immunity, 599 

 Electric, arc light, 171, 174 



current, alternating, 320 ff., 327 



ff., 334 



direct, 321, 327, 334 

 uses of, 165, 202, 248 ff., 316, 



320, 368, 446 



energy, distribution of, 38 ff . 

 measuring, 145, 173 

 production of, 234 ff., 246, 320, 



325 ff., 332 



transmission of, 246, 247 ff. 

 furnace, 427, 446, 451 

 generator, 319, 324 ff., 334 ff. 

 lighting, cost of, 159, 161 



methods of, 165 

 locomotive, 318 

 motor, 318, 321 ff. 

 Electricity, as energy, 109, 246 ff. 



source of heat, 145 

 Electrification of the air, 38 ff . 

 Electrode, 178, 184 

 Electrolysis of water, 130, 506 

 Electromagnet, 323 ff., 335 

 Element or simple substance, 119, 130, 



139 



Endosperm, 519, 521 

 Energy, electric, transmission of, 246, 



247, 249 



kinds of, 109, 308, 319 

 measurement of, 243, 245, 249, 354 



Energy, radiant, 106 ff. 



sources of, 233, 245, 308 



sun's, 66, 106, 517 



transmission of, 104 ff., 245 ff., 258 



transformations of, 108 ff., 245 ff., 



308 ff., 319, 324, 334 

 Engines, simple and compound, 310 ff., 



315 



Enzyme, 518 ff., 521, 553 

 Epidemic, 207 

 Equilibrium, 344, 348, 395 

 Ether, 108 

 Ethyl chlorid, 156 

 Eugenics, 505 

 Evaporation, 43, 305 ff., 315 



effect on climate, 47, 306 

 Expansion, an effect of heat, 64, 91, 

 108, 109 



Fahrenheit scale, 86 ff. 



Felspar, 408 ff., 415, 421, 425 



Fermentation, 133, 213, 562, 566, 580 



Fertilization of flower, 485, 494, 497 



Fertilizer, 443 



Filtration of water, 208 ff., 220 



Fire, conditions of, 69 ff. 



kindling a, 60 



uses of, 58 



Floral envelope, 483, 494 

 Flower, parts of, 483 ff., 494 

 Fly fungus, 554 

 Fly, as disease carrier, 532 ff. 

 Food of plants, 459 ff., 464, 515, 520 ff. 

 Foot-pounds, 243 ff., 269 

 Force pump, 230 ff. 

 Forces, graphic representation of, 354 



ff., 360 ff. 



Formalin, 583, 586, 598 ff. 

 Fractional distillation, 314 ff . 

 Friction, 258 ff., 278, 398 

 Frost, 53 



prediction of, 54 

 Fuel, heat values of, 142 ff. 



kinds of, 59, 66, 144 

 Fungi, 551 ff., 557 



Galvanometer, 327 

 Ganges River, water of, 193 

 Gas, artificial, 145, 161 ff. 



lighting, history of, 158 ff . 



mantle, Welsbach, 160 ff., 171 



natural, 129, 136 



