Man's physical universe

xanabras

INDEX 831

Thunderstorms, 268, 489

Tidal theory, 128-129

Tides, 93

height of, 94

lunar, 93

neap, 93, 94

primary, 94

secondary, 94

spring, 93, 94

solar, 93

Time

daylight saving, 121

measurement of, 118-122

sidereal, 119

standard, 120-121

Tints, 416

Tones, 466

Topography, 148-151

Tornadoes, 259-260

Torricellian vacuum, 208

Transformers, 511-512

step down, 512

step up, 512

Transportation, 322-327

airplane, 363

automobile, 344-345

by railroad, 325-326

by self-propelled highway vehicles,

325-327

by water, 322-324

Trisodium phosphate, 760

Tropopause, 132

Troposphere, 132

True bearing, 380

Tubes

Cooiidge, 550

Crookes, 544-546, 548

discharge, 569

Geissler, 545

Tyndal effect, 725-726

Typhoons, 260-261

Ultraviolet

fluorescence, 406-409

radiation, 390-391, 401

Unconformity, 169

Universe

Babylonians' picture, 54

Hebrews' picture, 54

our galaxy, 51

the galaxy, 51, 54, 85

Unsaturated compounds, 612-614, 617-

618

Uranus, 108

Urea, 666

Vacuum tubes

oscillators, 532-533

phototubes, 539-540

receivers, 500

rectifiers, 519, 533

Valence, 564, 579-581

CO-, 581

electro-, 580

Values, color, 416

Van de Graaff generator, 488, 490-491

Vaporization, 226

Vapor pressure, 226, 244-245

Venturi tube, 268-269

Venus, the planet, 102-103, 107

Vibrations

supersonic, 455

ultrasonic, 455

Vinylite, 678, 679, 681

Vinyon, 678, 679

Viruses, 794

Viscosity, 213, 237

Vitamins, 736, 738-743

Voice, human, 472

Volcanoes, 161-165

Volt, 492, 497-498

Volta, Alessandro, 495

Voltaic pile, 495

Vulcanism, 153, 161-165

Vulcanization, 705-706, 708

Vulcanized fiber, 665

Warfare, 799-800

Water

glass, 631

power, 299-300

purification, 759

repellents, 671

softening, 758-759

Waterless cooking utensils, 283

Waterspout, 259-260

Watts, 498

Wave-length, 450

Waves

light, 449-450

sound, 448-458

Wealth distribution of, 797

Weather

causes of, 254-255

forecasting, 264-273

maps, 268-269

observations, 264-268

vane, 265

Weight, 94

Wiltproofing, 671

Wimshurst machine, 490

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