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THE MACMILLAN COMPANY NEW YORK •

Revised Edition Copyrighted, 1943.

VI PREFACE the origin and evolution

viii PREFACK which the student sele

Preface Acknowledgments CONTENTS PA

CONTENTS Section 7. Coal Has Become

; INTRODUCTION In so far as man dev

4 THE INTELLIGENT SOLUTION OF PROBL

6 THE INTELLIGENT SOLUTION OF PROBL

. 8 THE INTELLIGENT SOLUTION OF PRO

10 THE INTELLIGENT SOLUTION OF PROB

12 THE INTELLIGENT SOLUTION OF PROB

14 THE INTELLIGENT SOLUTION OF PROB

16 THE INTELLIGENT SOLUTION OF PROB

18 THE INTELLIGENT SOLUTION OF PROB

UNIT I SECTION 3 THE SUPREME CONTRI

22 THE INTELLIGENT SOLUTION OF PROB

24 THE INTELLIGENT SOLUTION OF PROB

26 THE INTELLIGENT SOLUTION OF PROB

UNIT I SECTION 4 OBSERVATIONS MUST

30 THE INTELLIGENT SOLUTION OF PROB

32 THE INTELLIGENT SOLUTION OF PROB

34 THE INTELLIGENT SOLUTION OF PROB

36 THE INTELLIGENT SOLUTION OF PROB

38 THE INTELLIGENT SOLUTION OP' PRO

40 THE INTELLIGENT SOLUTION OF PROB

UNIT I SECTION 6 STRAIGHT THINKING

44 THE INTELLIGENT SOLUTION OF PROB

46 THK INTFLLIGENT SOLUTION OF PROB

48 THE INTELLIGENT SOLUTION OF PROB

UNIT II THE UNIVERSE IS A VAST SYST

54 THE UNIVERSE A VAST SYSTEM OF PA

50 THE UNIVERSE A VAST SYSTEM OF PA

58 THE UNIVERSE A VAST SYSTEM OF PA

60 THE UNIVERSE A VAST SYSTEM OF PA

62 THE UNIVERSE A VAST SYSTEM OF PA

64 THE UNIVERSE A VAST SYSTEM OF PA

66 THE UNIVERSE A VAST SYSTEM OF PA

08 THE UNIVERSE A VAST SYSTEM OF PA

70 THE UNIVERSE A VAST SYSTEM OF PA

11 THE UNIVERSE A VAST SYSTEM OF PA

74 THK UNIVKRSK A VAST SN'STKM OF P

76 THK rMX'ERSE A VAST SYSTEM OF PA

78 THE UNIVERSE A VAST SYSTEM OF PA

80 THE UNIVERSE A VAST SYSTEM OF PA

82 THE UNIVERSE A VAST SYSTEM OF PA

84 THE UNIVERSE A VAST SYSTEM OF PA

UNIT II SECTION 5 THE EARTH RECEIVE

; 88 THE UNIVERSE A VAST SYSTEM OF

91) THE UNIVERSE A VAST SYSTEM OF P

92 THE UNIVERSE A VAST SYSTEM OF PA

94 THE UNIVERSE A VAST SYSTEM OF PA

96 THE UNIVERSE A VAST SYSTEM OF PA

98 THE UNI\'i:i

100 THE UNIVERSE A VAST SYSTEM OF P

102 THK I'MX i:KSh: A VAST SWSri-.M

104 THE UNIVERSE A VAST SYSTEM OF P

106 THK UNIX'KRSK A \'AST SYSTEM OF

108 THE UNIVERSE A VAST SYSTEM OF P

no THE UNIVERSE A VAST SYSTEM OF PA

; 112 THE UNIVERSE A VAST SYSTEM OF

114 THE UNIVERSE A VAST SYSTEM OF P

116 THE UNIVERSE A VAST SYSTEM OF P

UNIT II SECTION 9 ASTRONOMICAL MEAS

120 THE UNIV^ERSE A VAST SYSTEM OF

122 THK UNIVERSE A VAST SYSTEM OF P

124 THE UNIVERSE A VAST SYSTEM OF P

126 THE EARTH AS MAN'S ABODE coolin

128 THE EARTH AS MAN'S ABODE As evi

130 THE EARTH AS MAN'S ABODE It is

UNIT III SECTION 2 THE NATURE OF TH

l.U THE EARTH AS MAN'S ABODE of the

136 THE EARTH AS MAN'S ABODE Inasmu

UNIT III SECTION 3 THE PRINCIPAL AG

140 THE EARTH AS MAN'S ABODE China

142 THE EARTH AS MAN'S ABODE within

144 THE EARTH AS MAN'S ABODE Zealan

146 THE EARTH AS MAN'S ABODE changi

UNIT III SECTION 4 THE CHARACTERIST

150 THE EARTH AS MAN'S ABODE stream

152 THE EARTH AS MAN'S ABODE majori

154 THE EARTH AS MAN'S ABODE Glacie

156 THE EARTH AS MAN'S ABODE 1891,

158 THE EARTH AS MAN'S ABODE type o

16() THK EARTH AS MAN'S ABOUK The t

162 THK EARTH AS MAN'S ABODF: River

164 THE EARTH AS MAN'S ABODE Tambor

166 THK EARTH AS MAN'S ABODE STUDY

168 THE EARTH AS MAN'S ABODE study

170 THK KARTH AS MAN'S ABODE fossil

172 THE EARTH AS MAN'S ABODE The Hi

174 THE EARTH AS MAN'S ABODE Synops

176 THE EARTH AS MAN'S ABODE the we

; UNIT III SECTION 7 GEOLOGICAL PRO

180 THE EARTH AS MAN'S ABODE minera

182 THE EARTH AS MAN'S ABODE presen

UNIT III SECTION 8 GEOLOGICAL PROCE

186 THE EARTH AS MAN'S ABODE ore (b

188 THE EARTH AS MAN'S ABODE The ma

190 THE EARTH AS MAN'S ABODE sedime

' U. S. Soil Conservation Service.

194 thf: karth as man's abode act o

196 THK KARTH AS MAN'S ABODK The Na

IW Tin: KARTH AS MAN'S ABODE built

200 THE EARTH AS MAN'S ABODE Man's

202 THE EARTH AS MAN'S ABODI-: full

UNIT IV SECTION 1 MATTER IN THE GAS

MATTER IN THE GASEOUS STATE 207 The

MATTER IN THE GASEOUS STATE 209 by

MATTER IN THE GASEOUS STATE 211 eas

UNIT IV SECTION 2 A KNOWLEDGE OF TH

THE PROPERTIES OF LIQUIDS 215 liqui

THE PROPERTIES OF LIQUIDS 217 The s

UNIT IV SECTION 3 THE PHYSICAL PROP

THE PHYSICAL PROPERTIES OF SOLIDS 2

THE PHYSICAL PROPERTIES OF SOLIDS 2

THE PHYSICAL PROPERTIES OF SOLIDS 2

THE ABSORPTION OR EVOLUTION OF HEAT

THE ABSORPTION OR EVOLUTION OF HEAT

THE ABSORPTION OR EVOLUTION OF HEAT

UNIT IV SECTION 5 PHYSICAL PROPERTI

THE KINETIC- MOLECULAR THEORY 235 2

THE KINETIC-MOLECULAR THEORY 237 Th

THE KINETIC-MOLECULAR THEORY 239 cu

REGULARITIES OF SOLUTIONS 241 3. Co

supersaturated solutions. REGULARIT

REGULARITIES OF SOLUTIONS 245 stanc

REGULARITIES OF SOLUTIONS 247 tant

REGULARITIES OF SOLUTIONS 249 4. Wh

CLIMATE AND WEATHER 251 vary becaus

CLIMATE AND WEATHER 253 orbit. For

CLIMATE AND WEATHER 255 refers to t

CLIMATE AND WEATHER 257 high suscep

CLIMATE AND WEATHER 259 twenty-five

CLIMATE AND WEATHER 261 per hour. A

CLIMATE AND WEATHER 263 6. Explain

WEATHER-FORECASTING 265 The cup ane

WEATHER-FORECASTING 267 ditions. Dr

WEATHER-FORECASTING 269 before turn

WEATHER-FORECASTING 271 Air-mass An

which ice will form. WEATHER-FORECA

AIR CONDITIONING 275 Paul then expe

AIR CONDITIONING 277 is merely a de

Silica gel is AIR CONDITIONING 279

AIR CONDITIONING 281 operated by th

AIR CONDITIONING 283 Heat conductiv

AIR CONDITIONING 285 quite comforta

UNIT V MAN HAS DISCOVERED AND HARNE

UNIT V SECTION 1 ENERGY MANIFESTS I

ENERGY MANIFESTS ITSELF IN MANY FOR

ENERGY MANIFESTS ITSELF IN MANY FOR

ENERGY MANIFESTS ITSELF IN MANY FOR

UNIT V SECTION 2 THE PRUDENT UTILIZ

THE CONSERVATION OF OUR ENERGY RESO

THE CONSERVATION OF OUR ENERGY RESO

THE CONSERVATION OF OUR ENERGY RESO

THE CONSERVATION OF OUR ENERGY RESO

UNIT V SECTION 3' MODERN MACHINES H

MACHINES HAVE RAISED LIVING-STANDAR

MACHINES HAVE RAISED LIVING-STANDAR

MACHINES HAVE RAISED LIVING-STANDAR

MACHINES HAVE RAISED LIVING-STANDAR

MACHINES HAVE RAISED LIVING-STANDAR

MACHINES HAVE RAISED LIVING-STANDAR

MACHINES HAVE RAISED LIVING-STANDAR

TRANSPORTATION HAS BEEN REVOLUTIONI

TRANSPORTATION HAS BEEN REVOLUTIONI

TRANSPORTATION HAS BEEN REVOLUTIONI

THE INTERNAL-COMBUSTION ENGINE 329

THE INTERNAL-COMBUSTION ENGINE 331

THE INTERNAL-COMBUSTION ENGINE 333

THE INTERNAL-COMBUSTION ENGINE 335

THE INTERNAL-COMBUSTION ENGINE 337

THE INTERNAL-COMBUSTION ENGINE 339

UNIT V SECTION 6 THE AUTOMOBILE TYP

THE AUTOMOBILE 343 consolidations o

THE AUTOMOBILE 345 same survey show

THE AUTOMOBILE 347 tenance costs in

THE AUTOMOBILE 349 Buying oil on th

THE AUTOMOBILE 351 STUDY QUESTIONS

AIRPLANE A TRIUMPH OF MODERN SCIENC

AIRPLANE A TRIUMPH OF MODERN SCIENC

AIRPLANE A TRIUMPH OF MODERN SCIENC

AIRPLANE A TRIUMPH OF MODERN SCIENC

AIRPLANE A TRIUMPH OF MODERN SCIENC

AIRPLANE A TRIUMPH OF MODERN SCIENC

UNIT V SECTION 8 FLYING AN AIRPLANE

AERODYNAMICS 367 Weight, i.e.^ a me

AERODYNAMICS 369 The Venturi tube i

AERODYNAMICS 371 An airfoil is any

AERODYNAMICS 373 right. After attai

AERODYNAMICS 375 An Airplane Practi

UNIT V SECTION 9 AVIGATION IS THE S

AVIGATION 379 Aeronautical charts a

AVIGATION 381 a chart the distance

AVIGAT ION 383 instructors and comm

UNIT VI ENERGY MAY BE PROPAGATED TH

388 ENERGY MAY BE PROPAC.AIED BY VI

390 ENERGY MAY BE PROPAGATED BY VIB

392 ENERGY MAY BE PROPAGATED BY VIB

F"iG. 170. Theironsshown in this fi

396 ENERGY MAY BE PROPAGATED BY VIB

UNIT VI SECTION 2 LIGHT MAY BE PROD

400 ENERGY MAY BE PROPAGATED BY VIB

402 ENERGY MAY BE PROPAGATED BY VIB

un ENERGY MAY BE PROPAGATED BY VIBR

406 ENERGY MAY BE PROPAGATED BY VIB

408 ENERGY MAY BE PROPAGATED BY VIB

410 ENERGY MAY BE PROPAGATED BY VIB

412 ENERGY MAY BE PROPAGATED BY VIB

414 ENERGY MAY BE PROPAGATED BY VIB

416 ENERGY MAY BE PROPAGATED BY VIB

418 ENERGY MAY BE PROPAGATED BY VIB

420 ENERGY MAY BE PROPAGATED BY VIB

•5 I o U -a "o ua "o 3 O U s

ELECTRICITY MAY BE CONVERTED INTO H

UNIT VII SECTION 7 THE GENERATION A

; RADIO GENERATION AND RECEPTION 52

RADIO GENERATION AND RECEPTION 531

RADIO GENERATION AND RECEPTION 533

RADIO GENERATION AND RECEPTION 535

RADIO GENERATION AND RECEPTION 537

UNIT VII SECTION 8 THE PHOTOELECTRI

THE PHOTOELECTRIC EFFECT 541 from e

THE PHOTOELECTRIC EFFECT 543 is nee

ELECTRICAL CONDUCTION IN GASES 545

ELECTRICAL CONDUCTION IN GASES 547

ELECTRICAL CONDUCTION IN GASES 549

ELECTRICAL CONDUCTION IN GASES 551

UNIT VIII MAN IS MASTERING HIS MATE

UNIT VIII SECTION 1 ALL MATTER CONS

: THE MATERIALS OF THE UNIVERSE 557

THE MATERIALS OF THE UNIVERSE 559 S

UNIT VIII THE ATOM IS SECTION 2 THE

THE ATOM IS THE UNIT OF CHEMICAL CH

THE ATOM IS THE UNIT OF CHEMICAL CH

UNIT VIII SECTION 3 ATOMS ARE COMPL

ATOMS ARE COMPLEX 569 Discharge-tub

ATOMS ARE COMPLEX 571 be determined

ATOMS ARE COMPLEX 573 determined by

ATOMS ARE COMPLEX 575 mutation expe

UNIT VIII SECTION 4 MOLECULES ARE H

THE NATURE OF MOLECULES • 579 ©

THE NATURE OF MOLECULES 581 orbit t

THE NATURE OF MOLECULES 583 Photogr

THE NATURE OE MOLECULES 585 values

ELECTROVALENT REACTIONS 587 tween c

ELECTROVALENT REACTIONS 589 being f

I ELECTRON TRANSFER 591 Oxidation-r

ELECTRON TRANSFER 593 current of el

: : ELECTRON TRANSFER 595 railroad

i gain — ELECTRON TRANSFER 597 Ox

ELECTRON TRANSFER 599 Magnesium is

UNIT VIII SECTION 7 ACIDS ARE PROTO

PROTON CHEMISTRY: ACIDS AND BASES 6

UNIT VIII SECTION 8 THE TRANSFER OF

THE TRANSFER OF PROTONS 607 be dete

THE TRANSFER OF PROTONS 609 A deter

H H H H H H H H COVALENT REACTIONS

COVALENT REACTIONS 613 enter into.

C H H COVALENT REACTIONS 615 H H H

I I I H H I I I H H I I I COVALENT

COVALENT REACTIONS 619

UNIT IX CREATIVE CHEMISTRY HAS CONT

624 CREATIVE CHEMISTRY The use of o

626 CREATIVE CHEMISTRY to sulfur tr

628 C'RKATIVK CHKMISTRV " Life Woul

630 CREATIVE CHEMISTRY Silicon carb

632 CREATIVE CHEMISTRY A gel is for

UNIT IX SECTION 2 METALLURGICAL PRO

: 636 CREATIVE CHEMISTRY impurities

638 CREATIVE CHEMISTRY electrons an

640 CREATIVE CHEMISTRY Iron is some

642 CREATIVE CHEMISTRY metals, prod

UNIT IX SECTION 3 COMBUSTION FURNIS

646 CREATIVE CHEMISTRY Not All Subs

648 CREATIVE CHEMISTRY ammonium pho

650 CREATIVE CHEMISTRY The vaporizi

: 652 CREATIVE CHEMISTRY Portland c

654 crp:ative chemistry 10. What co

656 CREATIVE CHEMISTRY The role whi

658 CREATIVE CHEMISTRY The nitrogen

660 CREATIVE CHEMISTRY NO2, which r

662 CREATIVE CHEMISTRY Ammonia is f

UNIT IX SECTION 5 CELLULOSE IS THE

666 CREATIVE CHEMISTRY duce a mater

668 ( RKATIVK (^HEMISTRY and other

670 CREATIVE CHEMISTRY All pyroxyli

672 CREATIVE CHEMISTRY 8. ShrinkpTO

UNIT IX SECTION 6 SYNTHETIC PLASTIC

676 CREATIVE CHEMISTRY asbestos, or

678 CREATIVE CHEMISTRY Moldings of

' i H i 680 CREATIVE CHEMISTRY comp

682 CREATIVE CHEMISTRY Fig. 297. A

N I 684 CREATIVE CHEMISTRY for use

686 CREATIVE CHEMISTRY mable, and t

UNIT IX SECTION 7 COAL HAS BECOME A

' Mustard Gas COOCH3 \y t Methyl sa

" 692 CRKATIVK CHKMISTRY these dyes

694 CREATIVE CHEMISTRY coal) with s

696 CREATIVE CHEMISTRY restricted i

698 CREATIVE CHEMISTRY ethyl lead w

700 CREATIVE CHEMISTRY Large-scale

702 CREATIVE CHEMISTRY In addition

704 CREATIVE CHEMISTRY 6. What are

: 706 CREATIVE CHEMISTRY makes it p

708 CREATIVE CHEMISTRY In 1895 the

H 710 CREATIVE CHEMISTRY need not b

712 CREATIVE CHEMISTRY Another new

714 CREATIVE CHEMISTRY price of nat

: UNIT X MAN'S PHYSICAL WELFARE IS

' 720 MAN'S PHYSICAL WELFARE and in

722 MAN'S PHYSICAL WELFARE Sugars a

724 MAN'S PHYSICAL WELFARE Coal, Oi

726 MAN'S PHYSICAL WELFARE becomes

728 MAN'S PHYSICAL WELFARE There Ar

730 MAN'S PHYSICAL WELFARE Plants R

732 MAN'S PHYSICAL WELFARE elements

734 MAN'S PHYSICAL WELFARE the Chil

736 MAN'S PHYSICAL WELFARE Proteins

UNIT X SECTION 3 VITAMINS, ENZYMES,

740 MAN'S PHYSICAL WELFARE Vitamin

742 MAN'S PHYSICAL WKLFARE Dietary

744 MAN'S PHYSICAL WELFARE

746 MAN'S PHYSICAL WELFARE Periodic

748 MAN'S PHYSICAL WELFARE Ethylene

UNIT X SECTION 4 LARGE-SCALE CHEMIC

752 MAN'S PHYSICAL WELFARE Insects

754 MAN'S PHYSICAL WELFARE Over thr

UNIT X SECTION 5 THE UTILIZATION OF

758 MAN'S PHYSICAL WELFARE ashes wi

760 MAN'S PHYSICAL WELFARE Detergen

: 762 MAN'S PHYSICAL WELFARE floor

764 MAN'S PHYSICAL WELFARE From the

766 MAN'S PHYSICAL WELFARE 5. What

768 MAN'S PHYSICAL WELFARE used wit

C I H C I H 770 MAN'S PHYSICAL WELF

C I . C I H C I H 772 MAN'S PHYSICA

C C C C 774 MAN'S PHYSICAL WELFARE

776 MAN*S PHYSICAL WELFARE Still an

•78 MAN'S PHYSICAL WELFARE by his

C C H C\ C— I CH H 1 I I H C C I

I I I I I I H I I 782 MAN'S PHYSICA

C I H C H C H 784 MAN'S PHYSICAL WE

786 MAN'S PHYSICAL WELFARE composit

788 MAN'S PHYSICAL WELFARE Ephedrin

UNIT X SECTION 8 PROTOPLASMIC AND C

792 MAN'S PHYSICAL WELFARE waste pr

794 MAN'S PHYSICAL WELFARE ested in

UNIT X SECTION 9 THE PROGRESS OF CI

798 MAN'S PHYSICAL WELFARE it is up

800 MAN'S PHYSICAL WELFARE Accordin

CONCLUSION You have just completed

804 CONCLUSION or the everyday prob

806 BIBLIOGRAPHY Author Thouless, R

808 BIBLIOGRAPHY Author

810 BIBLIOGRAPHY Author

812 BIBLIOGRAPHY Author Henney, K.

814 BIBLIOGRAPHY Author

816 IMBLlOCRAl'in' Author Smith, K.

818 INDEX Automobile {continued) de

820 INDKX Conductor, 487 Conglomera

822 INDEX Faraday's laws, 569, 587

824 INDEX Isomerism positional, 618

826 INDEX Music, 466-473 Musical in

828 INDEX Proton (continued) activi

830 INDEX Star {continued) Sirius,

832 Wind instruments, 470-471 Windm