616 



Index 



Isotherms, 5 ff., 10 

 and altitude, 10 



Keokuk power plant, 243, 249 



Kerosene, 129, 139, 143, 159, 313, 544 



Kilowatt hour, 145 



Kindling temperature, 61 ff. 



Kite, why it flies, 396 ff. 



Koch and filtration of water, 208, 528 



Krypton, 546 



Lactic acid, 553, 568, 584 



Lacustrian soil, 457, 474 



Larva of mosquito, 538, 539 



Latent heat, 305 ff., 315 



Latitude, determination of, 377 ff. 



Lava, 409, 414 ff. 



Lavoisier and chemistry, 70 ff., 74, 77, 



118 

 Layering, in propagation of plants, 



500 ff. 



Lead, 70, 81, 168, 169 

 Leaves, 465 ff. 



function of, 515 ff. 

 Legumes, 471, 475, 573 

 Lever, 254 ff., 262, 349 

 Lift pump, 15 ff., 230 

 Light as energy, 107 ff. 

 Lighting, artificial, 158 ff. 

 Lightning, 39 ff. 

 Lignite, 129, 414 ff. 

 Lime, 417, 426, 439, 443, 582 

 Limerock, 410 ff., 439, 451 

 Limestone, 410 ff., 438 

 Limewater, 124, 132, 138, 418 

 Litharge, 81 

 Loam, 456, 474 

 Local storms, 34 ff. 



winds, 22 



Locks, canal, operation of, 357, 387 

 Locomotives, 289 ff. 

 Lodestone, 371 

 Log, of ship, 377 ff. 

 London water supply, 193 

 Los Angeles water supply, 189, 226 

 Lows, see Cyclone. 

 Lubricating oil and friction, 260 

 Lumbering, 405 



Machines, 151, 243, 245 ff., 249, 254 ff., 



258, 308 ff., 330 ff., 349 

 Magnet, poles of, 372, 374 ff. 



Magnetic needle, 371 ff. 



variation of, 372 

 Magnetic property of iron, 324, 370, 



432, 449 ff. 



Magnetite, 176, 434, 450 

 Magneto, 326, 335 

 Malaria, 523 ff., 594 

 Malarial parasite, 524 ff. 

 Marble, 413 ff. 

 Marseilles-Rhone canal, 385 

 Matches, 61 



Measurement of work, 244, 268 ff. 

 Mendel, 497, 505 ff. 

 Mendel's law, 508 ff. 

 Mercury, b6iling point of, 89 



freezing point of, 90 



resistance to electric current, 

 168, 169 



uses of, 14, 85, 86 



vapor lamp, 178 ff. 

 Merozoites, 527 



Metals, relative abundance, 433 

 Metamorphic rock, 413 ff. 

 Metchnikoff's theory of immunity, 



601 ff. 



Meter, electric, 173 

 Method, scientific, 530 

 Mica, 408, 409, 415 

 Microorganisms, 546 ff. 

 Mildew, 555 



Mississippi River, control of, 381 

 Molds, 550 ff., 557, 594 ff. 



and decay, 554, 557, 572 



and disease, 554 ff. 



classification of, 552 ff. 



control of, 556 ff. 



distribution of, 555 



spores of, 550 



useful, 552 ff., 557 

 Molecular theory, 107 ff., 375 

 Molecules, 107, 305 

 Moraine, 474, 547 

 Mosquito, 523 ff., 536 ff. 



control of, 544 ff. 

 Motor, electric, 320 ff. 



gasoline, 330 ff. 

 Mulch, 468 



Naphtha, 129 

 Natural selection, 477 ff. 

 conditions of, 479 ff. 

 Navigation, instruments of, 370 ff. 



