Man's physical universe

xanabras

INDEX 825

Local anaesthetics, 771, 778-781

Loess, 139

Logical reasoning, 42-49, 56

Longitude, 124

Loudness, 451, 467

Loud-speakers, 533-534

Lows, 266-269

Lubricating oils, 213-214, 701

Lubrication,

automobile, 347-348

errors, 348-349

Lucite, 682

Lumen, 442-443

Luminescence, 398, 400-401

Lumitile, 677

Lustron, 677

Lyophilic colloids, 728

Machines, 307-320, 329-334

power developing, 322

Machine tools, 315-317

Magdeburg hemispheres, 207

Magma, 178, 180, 184-185

Magnesium, 599, 641, 648, 764

Magnet, coil of wire, 504-505

Magnetic

compass, 380

field, 479, 480-481

induction, 481

poles, 478, 479

storms, 87

variation, 380

Magnetism, 477-482

electro, 502-507

Magneto, 515

Magnets, 87, 477

Major chords, 468

Malaria, 768

Malleable iron, 636

Mandelic acid, 772

Manometer, 209

Marble, 182

Marconi, Guglielmo, 529-530

Mars, 106

Mass, 94

Mass production, 313-314

Mass spectrograph, 572-573

Matches, 647

Maxwell, Clerk, 527

Measurement

English system of, 33

errors in, 36-37

metric system of, 33

Melamine resins, 686

Melting points, 227

Mendel^eff, Dmitri Ivanovitch, 568

Mercerization, 665

Mercurochrome, 772

Mercury, the planet, 95, 102-103

Mercury vapor lamps, 399-400

Metabolism, 745

Metal, 559

Metalloids, 559

Metallurgy, 634-644

Metals, 592, 634-644

age of, 184-185

Metamorphic rocks, 180-182

Meteorites, 114-116, 128

aerolites, 114

showers of, 115-116

Siberian, 116

siderites, 114

siderolites, 114

tektites, 116

Meteorology, 250-273

defined, 40

survey of 250-273

Meteors, 111, 113

Metric system, 33

Mica, 632

Microphones, 534

Microseisms, 159

Mildewproofing, 671

Milky Way, 74

Millibar, 268

Mineral, 180, 184-191, 732, 735, 737

wool, 653

Mineralogy, defined, 40

survey of, 178-191

Mirages, 438-439

Mirrors, 433

concave, 435

convex, 436

Mixture, 240, 557-559

Mold, fossil, 170

Molecular weight, 564

Molecule, 234-235, 563, 577-585

Moon, the, 103-106

and tides, 93

Morphine, 785

Morse, Samuel, 505

Mortar, 651

Mother-lode, 186

Mothproofing, 671

Motion

pictures, three dimensional, 429-430

reciprocating, 311

rotary, 311

vibratory, 448-449

Mountains, 150, 159

volcanic, 164

Mufflers, automobile, 461-462

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