24 



EVERYDAY SCIENCE 



References are to pages 



Time Continued 

 measure of . . 



day and night . 



year .... 

 Standard Time . 



variations from 



24-26, 33 

 24-26, 33 

 . . 26 

 34-35, 40 

 34 



daylight saving . . 37, 40 



time meridians 35 



Toadstools 398 



Tobacco (effects of) . 432-433, 456 

 Tongue (organ of taste) . . . 413 



Tools 459-461 



development of .... 459-461 



primeval 459 



see also Inventions 

 Tornadoes (cyclonic storms) 



230-231, 245 

 Torricelli (inventor of mercury 



tube) 118 



Touch (sense of) 413 



Toxins 444 



Trade winds 221, 245 



Transference (of heat) . . 86-94 

 conduction .... 87-88,94 

 convection current . . 88-90, 94 



radiation 90,94 



Transmission (of water-pres- 

 sure) 147 



Transpiration (evaporation in 



plants) 106 



Transportation . . . . . 167, 196 

 rivers as means of . . . . . 196 

 ocean as means of . . . . 167 



Tropical calms 221 



Trough (of waves) 157 



Tsetse (carrier of disease) . . 452 

 Tuberculosis (bacterial disease) 442 



Tungsten 488 



Turpentine (a solvent) . . . 140 



Twilight 3,355 



Typhoid fever (bacterial disease) 442 



Universe (of the ancients) . . 8 

 Uranus (a planet) . . . . 11,49 



day on 12 



distance from earth and sun 11 

 position in space determined 

 by laws of gravitation and 



inertia 49 



Valves (of heart) 413 



Vaporizing (of water) .... 136 



Vegetables 427-431 



composition of 430 



Veins (filled with minerals) . . 515 



Veins (of leaves) 381 



of dicotyledonous plants . . 381 



of monocotyledonous plants . 381 



Veins (of human body) . . . 409 



capillaries 409 



functions of 409 



Ventilation .... 112^114,313 



of houses 112-114 



of soils 313 



Ventricles (of heart) .... 412 



Venus (a planet) . . . .5, 11-12 



beauty and brilliancy of . . 12 



day on . 12 



distance from earth and sun 5, 12 



Vertebrates 400 



amphibia, birds, fishes, mam- 

 mals, reptiles 400 



Vesta (an asteroid) .... 11 

 Vesuvius (a volcano) . . . 504-506 



Monte Somma 506 



Herculaneum and Pompeii 506 



Vitamins 430-431,436 



effect of heat upon .... 430 



vital element of food . . . 430 



Volcanic action . . . 155, 284-285, 



503-515, 523 



earthquakes 513-515 



fault 513-514 



geysers 511-513 



islands 509 



volcanoes . 284-285,503-511,523 

 Volcanoes 155, 284-285, 503-511, 523 



cause of 503 



craters of 503 



distribution of . . . .508-511 

 eruptions as factors in sur- 

 face-changes . . . 284-285 

 eruptive matter . . 284-285, 

 504-506 



loess beds 285 



famous volcanoes . . . 504-510 



Monte Nuovo 504 



Mt. Lassen .... 509-510 

 Mt. Pelee 506-508 



