Index 



671 



symbols, 28-30, 45, 143 

 sympathetic system, 434, 642 

 systemic circulation, 421, 642 



taffrail log, 277, 548 



talking motion pictures, 584-585, 



642, (584) 



tannin, 378, 532, 642 

 tannin-producing plants, 532 

 tapeworm, 370 

 taste, 330, 399 

 tea, 377-378, 501, 530, 642 

 teeth, 399-400, 443, (399, 400) 



care of, 64, 411-412 

 telegraph, 218-220, 549, 642, 



(220) 



telegraphic code, 218-219 

 telephone, 221-222, 549, 566, 590- 



591, 642, (221) 

 telephotography, 585-588, 642, 



(586, 587) 



telescope, 151, 161, 642 

 television, 238, 584, 588-590, 642 

 temperate zones, 119, 120, 134, 



(120) 

 temperature, 642 



boiling, 86, 88-89 



freezing, 86, 88, 121, 127 



heat and, 47, 84, 190 



kindling, 84-85, 629 



measurement of, 86-87, 123-124, 

 596 



of atmosphere, 118, 121, 122, 126, 

 131 



of blood, 418 



of body, 87, 349 



of room, 87, 111, 123-124, 598, 

 599, 600 



of water, 46, 84 

 tendons, 332, 642 

 terra'rium, 537, 642 

 testa, 504-505, 642, (504) 

 tests, 



of foods, 356-357 



of hearing, 177 

 tetanus, 457, 642 



(see also lockjaw) 

 Thales, 203 

 thein, 377-378, 642 

 theobromine, 378, 642 



theories of disease, 453-454, 466 

 theory, 



atomic, 22-23, 617 



denned, 7, 642 



electron, 207-208, 623 



molecular, 22, 82, 101 



of magnetism, 199 

 thermometer, 123-124, 642, (123) 



centigrade, 86, 619, (86) 



clinical, 87, 620 



Fahrenheit, 86-87, 624, (86) 



fixed points of, 86-87 

 thermos bottle, (see vacuum bot- 

 tle) 



thermostat, 111, 596-597, 600, 642 

 thoracic duct, 404, 421, 642 

 thorium, 192, 569 

 throat, 342, 471, 485 

 thunder, 136, 207, 642 

 thunderstorms, 121, 136 



destruction by, 136 

 thyroid glands, 423, 643 

 tick, 454 



tides, 155-156, 643 

 tiles, 303 

 time, 



belts, 160, 643, (160) 



Greenwich, 159, 277 



solar, 159 



standard, 159-160, 641, (160) 

 tin, 30 



tissues, 313-314, 324, 325, 332, 335, 

 342, 354, 355, 383, 392, 417, 419, 

 431, 643 

 tobacco, effects of use, 345-346, 



383-385, 424, 436 

 tone, 173, 

 tongue, 399 

 tonsilitis, 347 

 tonsils, 347, 400, 471, 643 

 tooth paste, 64 

 tornado, 119, 131, 134, 136-137, 138, 



643, (137, 138) 

 torpedoes, 603 

 Torricelli, Evangelista, 39 

 torrid zone, 119, 120 

 total eclipse of sun, 151, 157, 158 

 touch, 330 



toxin-antitoxin, 460-461, 643, (461) 

 toxins, 347, 395, 409, 457, 458, 460, 



473, 643 

 trachea, 342, 400, 455, 643, (342) 



