Man's physical universe

xanabras

826 INDEX

Music, 466-473

Musical instruments

stringed, 469-470

wind, 470-471

Musical scales

diatonic, 468

international, 468-469

scientific, 468

National Resources Committee, 2, 97

Natural gas, 189-190, 695-703

Natural rubber, 709-710, 714

Navigation, 123, 124

aerial, 377-383

celestial, 377-378

dead reckoning, 379-380

instruments, 383

pilotage, 378-379

radio, 381-382

Near-sightedness, 439-440

Nebulae

Andromeda, 81, 82, 84

dark, 78

exterior, 81-83

extra galactic, 84

great Magellanic cloud, 81

irregular exterior, 81

of Pleiades, 78

Orion, 78-79

planetary, 78

ring, 83

spiral, 81

Nebular hypothesis, 127

Neoarsphenamine, 769

Neon, 662

lamps, 403

Neoprene, 693, 711

gasoline tanks, 361-363

Nephoscope, 271

Neptune, 109

Neutralization, 605-608

Neutrons, 574, 576

Newton, Sir Isaac, 35, 65, 69, 89, 91-100,

108-109, 234, 389, 411, 561

Niagara Falls, 151, 196

Nicol prism, 423

Nicotine, 787

Nitric acid, 659-660

Nitrogen, 733-734

cycle, 658

fixation, 657-658

Nitroglycerine, 669

Noise, 466

Nonconductor, 487

Nonelectrolyte, 587

Nonmetals, 559, 592

Novachord, 471-472

Nylon, 684-686

Observation

bare, 21-22

experimental, 21-22, 28-34, 36

Observatories, astronomical

Lick, 62

Lowell, 109

Mount Palomar, 66

Mount Wilson, 65

others, 67, 68

Yerkes, 62

Obsidian, 165, 178

Oceans, 152-153

currents, 252

Occultations, 106

Occurrence, 206, 559

Octave, 467-468

Oersted, H. C, 502-503

Ohm, 497-498

Oilcloth, 669

Oils, 722-723

Oliver filter, 757

Ore, 184

Organic

acids, 615, 722

chemistry, 610

glass, 682-683

Organization, 796-797

Orientation of molecules, 480

Oscillograph, 452

Osmosis, 245-247

Osmotic pressure, 247-248

Overtones, 453, 466, 467

Oxidation, 595, 644

Oxidation-reduction, 590, 591, 595-598

Oxidizing agents, 597

Oxygen, 623-624, 644

Ozone, 624, 770

Paleontologist, 171

Parachutes, 363

Paradichlorobenzene, 754

Parallel wiring, 499-501

Parasitic drag, 367

Parchment paper, 665

Parkerizing process, 639

Patent medicines, 788

Patents, U. S., 6, 702

Peptization, 729

Perbunan, 709-710

Perfumes, synthetic, 689

Period

in sound, 453

of earth's history, 167, 172-176

More magazines by this user
Similar magazines