Index 



663 



migration, 153 



milk, 359-360, 442, 445, 459, 465, 



468-469, 471, (360, 361) 

 Milky Way, 164, 632, (164) 

 Millikan, Robert A., 572, 577, (572) 

 mineral matter, 28-30, 57, 62, 355- 



358, 364, 405, 417, 425, 632 

 mineral springs, 56-57 

 mirror, 115, 183-185 

 mixed diet, 363-366 

 mixture, 30, 632 



moisture, 36-37, 108, 111, 112, 121- 

 125, 132, 136, 509-511, 598, 599, 

 600 



molar teeth, 399, 632, (399) 

 molds, 441-442, 632 

 molecular motion, 22, 82, 89, 101, 



104, 180 



molecular theory, 632 

 of heat, 82, 101 

 of matter, 22, 82 



molecules, 22-23, 68, 82, 83, 88, 89, 

 101, 104, 180, 199, 251, 312, 632 

 mollusks, 540 

 momentum, 261-262, 632 

 monocotyledon, 497, 505, 632 

 monoplane, 282, 632, (285, 606) 

 Montgolfier brothers, 278, 284 

 moon, 150, 151-155, 158, 632, (153, 



154) 



month, 155 

 orbit of, 152-153 

 phases of, 153-155, 635, (154) 

 relation to tides, 155 

 revolution, 152, 153-155, (152) 

 rotation of, 153 

 waning of, 155 

 waxing of, 155 

 moons, 150, (149) 

 morphine, 385, 387, 632, (387) 

 Morse code, 218-219, 632, (219) 

 Morse, Samuel F. B., 218, 549 

 mosquitoes, 324, 461, 541-543, 



(542) 

 motion, 312, 320, 321, 328, 330-332, 



493 

 motion, energy of, 16-18, 67, 119, 



131, 170, 224 



motion pictures, 190, 584-585, 632 

 motor, (285) 



electric, 216, 225, 266, 273, 276, 

 588, 595, 603 



motor Cont'd 

 gasoline, 92, 224, 262-265, 285, 



547 



rotary, 285 



motor nerves, 432, (316) 

 mountains and rainfall, 125 

 mouth, 398-400, 405, 411-412, 413, 



455 

 mucous membrane, 342, 399, 402, 



413, 633 

 Muir, J., 577 

 muscles, 19, 81, 330-335, 354, 417, 



423, 481, 633, (330) 

 Muscle Shoals, 68, 69, (69) 

 muscular, 



activity, 362, 401 

 energy, 17 

 tissue, 335 

 musical instruments, 173-174, (174) 



N 



naphtha, 89, 91-92, 633 



narcotics, 382-391, 395, 436, 475, 633 



(387) 



nasal passages, 342, 346, 471, (342) 

 national forests, 519-520 

 nature, 6, 633 

 Nautical Almanac, 277 

 navigation, 76, 271-277, 547-548, 



633 



instruments, 277, 548 

 nearsightedness, 188-189, 633, 



(189) 



negative electricity, 204, 206, 208 

 neon tubes, 232, 587, 589, 633 

 Neptune, 150, 164, (149) 

 nerve fibers, 431 

 nerves, 188, 430-436, 633 

 nervousness, 189, 435 

 nervous system, 377, 382, 386, 430- 



438, 633, (434) 

 netted-veined leaves, 497, 633, 



(498) 



neuron, 431, 432, 633 

 neutral substances, 63, 633 

 neutralization, 63, 403 

 Newcomen, 558 

 Newton, Sir Isaac, 7, 557-558, 577, 



(558) 

 Niagara Falls, 13, 18, 50, 68, 75, 



225, 226, 300 



