Man's physical universe

xanabras

828 INDEX

Proton (continued)

activity, 606-607

donor, 601-604

transfer, 590, 605-609

Pseudomorph, 170

Psychrometer, 256

Ptolemy, Claudius, 56-57

Public address system, 534

Public service commissions, 301

Public Utility Act, 301

Pumps, 209

Pyrethrum. 754

Pyrex glass, 67, 224

Pyroxylin, 668

Quality of sounds, 467

Quick freezing of foods, 743

Quinine, 784

Radiation, 254

of heat, 284-285

Radicals, hydrocarbon, 610

Radio, 527-537

altimeter, 382

navigation, 381-382

rays, ultrashort, 396-397

Radioactivity, 89, 570-571

Radiometer, 238

Rainbow, 412

Rain gauge, 265

Rare gases, 662

Rationalization, 44-45

Rayon, 666-668

Rays

absorbed, 432

alpha, 570, 572

Becquerel, 569

beta, 571

cosmic, 391

cathode, 541-542, 546-548, 569

gamma, 391, 571

incident, 432

infrared, 69, 392-396

reflected, 432

Roentgen, 546-550

ultrashort radio, 396-397

ultraviolet, 69, 390-391, 402-403

Xrays, 391, 571, 572

Reaction, chemical

addition, 617

chain, 582

completion of, 588-589

condensation, 675

covalent, 610-619

covalent hydrolysis, 613

cracking, 612-613

endothermic, 581, 719-720

exothermic, 581

hydrogenation, 612-614

polymerization, 613, 675

substitution, 614-616, 618

types of, 590-591

Reasoning

by analogy, 47

by authority, 46-47

confused, 43

crooked, 43-49

deductive, 21

inductive, 21

logical, 42-49

pseudo-statistical, 43-44

speculative, 44

Rectifiers, 519

Reducing agents, 597

Reduction, 595, 635

Refining, 635

of salt, 757

Reflection, 445

and polarized light, 424

of sound waves, 449, 462

Refraction

index of, 217-218

of light, 436-440

of sound waves, 452

Refractometers, 438

Refractories, 646

Refrigeration, 222-223, 229-231, 276-

277

Regelation, 222

Relative humidity, 255-257

Repellents

insect, 754-755

Research, 696

and energy conservation, 302-303

and practical application, 356

need for more support of, 304-306

Resins, 669-670, 674-687

Resistance, electrical, 497, 521-522

Resonance

color produced by, 413-414

of sound, 460-461. 469

Reverberations, 462, 464

Rigid thermoplastics, 675

Rigid thermosetting plastics, 675

Rivers, 148-149

Roaring forties, 251

Roasting, 627, 635

Rocks

igneous, 178-181

metamorphic, 178, 180-182

origin of, 178

sedimentary, 178, 180-182

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