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Man's physical universe

UNIT X SECTION 8

UNIT X SECTION 8 PROTOPLASMIC AND CELLULAR ORGANIZATION ARE ESSENTIAL TO LIFE Nature makes so gradual a transition from the inanimate to the animate kingdom that the boundary lines which separate them are indistinct and doubtful. — Aristotle. Introduction. Life still remains an unsolved riddle. It follows, of course, that death is likewise not understood. But no one questions the reality of life and death. The study of life and death intrigues the scientist, but a tremendous amount of research on the nature of proteins must be done before much progress can be made in the study of the nature of life. At the present time it appears that life is not a characteristic of any atom, molecule, gene, or chromosome but is rather the result of an organization of many molecules into an equilibrium, which adjusts itself to its environment. disturbance of this equilibrium. Death appears to be the result of a radical The Elixir of Life and the Fountain of Youth Are Goals of Biochemistry. The biochemist is now trying to find out what causes one to grow old. Would it be possible to delay old age? The " philosopher's stone " was much sought after by the alchemists, because its possessor could then convert base metals into precious metals. The modern "philosopher's stone," the cyclotron, is a very complex instrument, but it does enable the scientist of our day to achieve the transmutation of elements sought after by the alchemists. The iatrochemists changed the emphasis from inorganic chemistry to biochemistry, their magical goal being the "elixir of life," which would not only cure disease but confer perpetual youth upon its owner. Jean Ponce de Leon did not find the "fountain of youth," but he did discover Florida. The modern scientist is delving into the mysteries of life, growth, development, old age, and death. Can you imagine a more exciting adventure? 790

PROTOPLASMIC AND CELLULAR ORGANIZATION 791 Perhaps you will want to join one of these modern crews of laboratory exploration. Certainly you will want to give them your support and keep informed as to their discoveries. Carrel's Experiments Are Very Significant. Alexis Carrel concluded from his studies that cells may be kept alive in a wholly artificial environment, provided that they receive the proper nutrients, as well as air, and that the waste products are removed. On January 17, 1912 (at the Rockefeller Institute for Medical Research), he extirpated a minute fragment from the heart of a seven-day old chick embryo, immersed it in a drop of chick plasma, and incubated it. At intervals, the fragment was washed in an isotonic saline solution and placed in fresh medium. It pulsated for over one hundred days after its separation from the original heart. But young connective tissue cells called fibroblasts also were present in the original tissue, and these gradually overgrew the muscle cells, so that ultimately a pure strain of fibroblasts resulted. When chick embryonic extract was added to the medium, the culture grew more rapidly and soon doubled in size after forty-eight hours' incubation. Then subcultures were made by dividing it into two parts, and soon thereafter, by repeated transfer, the strain was well established. Later, the techniques were improved, and the cultures were grown in glass containers called Carrel flasks, which greatly simplified the procedures. When this paragraph was written in 1941, at the Lederle Laboratories cultures derived from the original bit of tissue were still multiplying actively. There is no reason to believe that this strain of fibroblasts cannot be kept alive for hundreds of years. Had it been feasible since the beginning of the experiment to cultivate every subculture, ad infinitum, the mass of tissue that could have been obtained would long since have exceeded the bulk of the sun. Charles Lindbergh's "Heart Pump" Permits Organs to Be Kept Alive. Charles Lindbergh, working with Alexis Carrel, invented a perfusion pump which causes a nutrient liquid to circulate rhythmically through the arterial and venous systems of an organ. In this pump hundreds of organs, hearts, lungs, livers, etc., have been kept alive for from two to thirty days; the heart continues to beat and the glands continue to secrete hormones. Eventually, however, poisonous wastes accumulate, and the organ ceases to function. Perhaps some modification in technique might make it possible to remove these waste products. Is it the accumulation of waste products that causes old age? Might it not be possible to find some substance that would react with these

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    Digitized by the Internet Archive i

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    THE MACMILLAN COMPANY NEW YORK •

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    Revised Edition Copyrighted, 1943.

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    VI PREFACE the origin and evolution

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    viii PREFACK which the student sele

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    Preface Acknowledgments CONTENTS PA

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    CONTENTS Section 7. Coal Has Become

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    ; INTRODUCTION In so far as man dev

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    4 THE INTELLIGENT SOLUTION OF PROBL

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    6 THE INTELLIGENT SOLUTION OF PROBL

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    . 8 THE INTELLIGENT SOLUTION OF PRO

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    10 THE INTELLIGENT SOLUTION OF PROB

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    12 THE INTELLIGENT SOLUTION OF PROB

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    14 THE INTELLIGENT SOLUTION OF PROB

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    16 THE INTELLIGENT SOLUTION OF PROB

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    18 THE INTELLIGENT SOLUTION OF PROB

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    UNIT I SECTION 3 THE SUPREME CONTRI

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    22 THE INTELLIGENT SOLUTION OF PROB

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    24 THE INTELLIGENT SOLUTION OF PROB

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    26 THE INTELLIGENT SOLUTION OF PROB

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    UNIT I SECTION 4 OBSERVATIONS MUST

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    30 THE INTELLIGENT SOLUTION OF PROB

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    32 THE INTELLIGENT SOLUTION OF PROB

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    34 THE INTELLIGENT SOLUTION OF PROB

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    36 THE INTELLIGENT SOLUTION OF PROB

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    38 THE INTELLIGENT SOLUTION OP' PRO

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    40 THE INTELLIGENT SOLUTION OF PROB

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    UNIT I SECTION 6 STRAIGHT THINKING

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    44 THE INTELLIGENT SOLUTION OF PROB

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    46 THK INTFLLIGENT SOLUTION OF PROB

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    48 THE INTELLIGENT SOLUTION OF PROB

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    UNIT II THE UNIVERSE IS A VAST SYST

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    54 THE UNIVERSE A VAST SYSTEM OF PA

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    50 THE UNIVERSE A VAST SYSTEM OF PA

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    58 THE UNIVERSE A VAST SYSTEM OF PA

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    60 THE UNIVERSE A VAST SYSTEM OF PA

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    62 THE UNIVERSE A VAST SYSTEM OF PA

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    64 THE UNIVERSE A VAST SYSTEM OF PA

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    66 THE UNIVERSE A VAST SYSTEM OF PA

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    08 THE UNIVERSE A VAST SYSTEM OF PA

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    70 THE UNIVERSE A VAST SYSTEM OF PA

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    11 THE UNIVERSE A VAST SYSTEM OF PA

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    74 THK UNIVKRSK A VAST SN'STKM OF P

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    76 THK rMX'ERSE A VAST SYSTEM OF PA

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    78 THE UNIVERSE A VAST SYSTEM OF PA

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    80 THE UNIVERSE A VAST SYSTEM OF PA

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    82 THE UNIVERSE A VAST SYSTEM OF PA

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    84 THE UNIVERSE A VAST SYSTEM OF PA

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    UNIT II SECTION 5 THE EARTH RECEIVE

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    ; 88 THE UNIVERSE A VAST SYSTEM OF

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    91) THE UNIVERSE A VAST SYSTEM OF P

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    92 THE UNIVERSE A VAST SYSTEM OF PA

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    94 THE UNIVERSE A VAST SYSTEM OF PA

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    96 THE UNIVERSE A VAST SYSTEM OF PA

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    98 THE UNI\'i:i

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    100 THE UNIVERSE A VAST SYSTEM OF P

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

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    104 THE UNIVERSE A VAST SYSTEM OF P

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    106 THK UNIX'KRSK A \'AST SYSTEM OF

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    108 THE UNIVERSE A VAST SYSTEM OF P

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    no THE UNIVERSE A VAST SYSTEM OF PA

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    ; 112 THE UNIVERSE A VAST SYSTEM OF

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    114 THE UNIVERSE A VAST SYSTEM OF P

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    116 THE UNIVERSE A VAST SYSTEM OF P

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    UNIT II SECTION 9 ASTRONOMICAL MEAS

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    120 THE UNIV^ERSE A VAST SYSTEM OF

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    122 THK UNIVERSE A VAST SYSTEM OF P

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    124 THE UNIVERSE A VAST SYSTEM OF P

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    126 THE EARTH AS MAN'S ABODE coolin

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    128 THE EARTH AS MAN'S ABODE As evi

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    130 THE EARTH AS MAN'S ABODE It is

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    UNIT III SECTION 2 THE NATURE OF TH

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

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    136 THE EARTH AS MAN'S ABODE Inasmu

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    UNIT III SECTION 3 THE PRINCIPAL AG

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    140 THE EARTH AS MAN'S ABODE China

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    142 THE EARTH AS MAN'S ABODE within

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    144 THE EARTH AS MAN'S ABODE Zealan

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    146 THE EARTH AS MAN'S ABODE changi

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    UNIT III SECTION 4 THE CHARACTERIST

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    150 THE EARTH AS MAN'S ABODE stream

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    152 THE EARTH AS MAN'S ABODE majori

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    154 THE EARTH AS MAN'S ABODE Glacie

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    156 THE EARTH AS MAN'S ABODE 1891,

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    158 THE EARTH AS MAN'S ABODE type o

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

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    162 THK EARTH AS MAN'S ABODF: River

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    164 THE EARTH AS MAN'S ABODE Tambor

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    166 THK EARTH AS MAN'S ABODE STUDY

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    168 THE EARTH AS MAN'S ABODE study

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    170 THK KARTH AS MAN'S ABODE fossil

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    172 THE EARTH AS MAN'S ABODE The Hi

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    174 THE EARTH AS MAN'S ABODE Synops

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    176 THE EARTH AS MAN'S ABODE the we

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    ; UNIT III SECTION 7 GEOLOGICAL PRO

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    180 THE EARTH AS MAN'S ABODE minera

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    182 THE EARTH AS MAN'S ABODE presen

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    UNIT III SECTION 8 GEOLOGICAL PROCE

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    186 THE EARTH AS MAN'S ABODE ore (b

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    188 THE EARTH AS MAN'S ABODE The ma

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    190 THE EARTH AS MAN'S ABODE sedime

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    ' U. S. Soil Conservation Service.

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    194 thf: karth as man's abode act o

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    196 THK KARTH AS MAN'S ABODK The Na

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    IW Tin: KARTH AS MAN'S ABODE built

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    200 THE EARTH AS MAN'S ABODE Man's

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    202 THE EARTH AS MAN'S ABODI-: full

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    UNIT IV SECTION 1 MATTER IN THE GAS

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    MATTER IN THE GASEOUS STATE 207 The

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    MATTER IN THE GASEOUS STATE 209 by

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    MATTER IN THE GASEOUS STATE 211 eas

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    UNIT IV SECTION 2 A KNOWLEDGE OF TH

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    THE PROPERTIES OF LIQUIDS 215 liqui

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    THE PROPERTIES OF LIQUIDS 217 The s

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    UNIT IV SECTION 3 THE PHYSICAL PROP

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    THE PHYSICAL PROPERTIES OF SOLIDS 2

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    THE PHYSICAL PROPERTIES OF SOLIDS 2

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    THE PHYSICAL PROPERTIES OF SOLIDS 2

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    THE ABSORPTION OR EVOLUTION OF HEAT

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    THE ABSORPTION OR EVOLUTION OF HEAT

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    THE ABSORPTION OR EVOLUTION OF HEAT

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    UNIT IV SECTION 5 PHYSICAL PROPERTI

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    THE KINETIC- MOLECULAR THEORY 235 2

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    THE KINETIC-MOLECULAR THEORY 237 Th

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    THE KINETIC-MOLECULAR THEORY 239 cu

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    REGULARITIES OF SOLUTIONS 241 3. Co

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    supersaturated solutions. REGULARIT

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    REGULARITIES OF SOLUTIONS 245 stanc

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    REGULARITIES OF SOLUTIONS 247 tant

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    REGULARITIES OF SOLUTIONS 249 4. Wh

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    CLIMATE AND WEATHER 251 vary becaus

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    CLIMATE AND WEATHER 253 orbit. For

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    CLIMATE AND WEATHER 255 refers to t

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    CLIMATE AND WEATHER 257 high suscep

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    CLIMATE AND WEATHER 259 twenty-five

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    CLIMATE AND WEATHER 261 per hour. A

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    CLIMATE AND WEATHER 263 6. Explain

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    WEATHER-FORECASTING 265 The cup ane

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    WEATHER-FORECASTING 267 ditions. Dr

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    WEATHER-FORECASTING 269 before turn

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    WEATHER-FORECASTING 271 Air-mass An

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    which ice will form. WEATHER-FORECA

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    AIR CONDITIONING 275 Paul then expe

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    AIR CONDITIONING 277 is merely a de

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    Silica gel is AIR CONDITIONING 279

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    AIR CONDITIONING 281 operated by th

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    AIR CONDITIONING 283 Heat conductiv

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    AIR CONDITIONING 285 quite comforta

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    UNIT V MAN HAS DISCOVERED AND HARNE

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    UNIT V SECTION 1 ENERGY MANIFESTS I

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    ENERGY MANIFESTS ITSELF IN MANY FOR

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    ENERGY MANIFESTS ITSELF IN MANY FOR

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    ENERGY MANIFESTS ITSELF IN MANY FOR

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    UNIT V SECTION 2 THE PRUDENT UTILIZ

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    THE CONSERVATION OF OUR ENERGY RESO

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    THE CONSERVATION OF OUR ENERGY RESO

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    THE CONSERVATION OF OUR ENERGY RESO

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    THE CONSERVATION OF OUR ENERGY RESO

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    UNIT V SECTION 3' MODERN MACHINES H

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    MACHINES HAVE RAISED LIVING-STANDAR

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    MACHINES HAVE RAISED LIVING-STANDAR

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    MACHINES HAVE RAISED LIVING-STANDAR

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    MACHINES HAVE RAISED LIVING-STANDAR

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    MACHINES HAVE RAISED LIVING-STANDAR

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    MACHINES HAVE RAISED LIVING-STANDAR

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    MACHINES HAVE RAISED LIVING-STANDAR

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    TRANSPORTATION HAS BEEN REVOLUTIONI

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    TRANSPORTATION HAS BEEN REVOLUTIONI

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    TRANSPORTATION HAS BEEN REVOLUTIONI

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    THE INTERNAL-COMBUSTION ENGINE 329

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    THE INTERNAL-COMBUSTION ENGINE 331

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    THE INTERNAL-COMBUSTION ENGINE 333

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    THE INTERNAL-COMBUSTION ENGINE 335

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    THE INTERNAL-COMBUSTION ENGINE 337

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    THE INTERNAL-COMBUSTION ENGINE 339

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    UNIT V SECTION 6 THE AUTOMOBILE TYP

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    THE AUTOMOBILE 343 consolidations o

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    THE AUTOMOBILE 345 same survey show

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    THE AUTOMOBILE 347 tenance costs in

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    THE AUTOMOBILE 349 Buying oil on th

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    THE AUTOMOBILE 351 STUDY QUESTIONS

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    AIRPLANE A TRIUMPH OF MODERN SCIENC

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    AIRPLANE A TRIUMPH OF MODERN SCIENC

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    AIRPLANE A TRIUMPH OF MODERN SCIENC

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    AIRPLANE A TRIUMPH OF MODERN SCIENC

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    AIRPLANE A TRIUMPH OF MODERN SCIENC

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    AIRPLANE A TRIUMPH OF MODERN SCIENC

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    UNIT V SECTION 8 FLYING AN AIRPLANE

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    AERODYNAMICS 367 Weight, i.e.^ a me

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    AERODYNAMICS 369 The Venturi tube i

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    AERODYNAMICS 371 An airfoil is any

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    AERODYNAMICS 373 right. After attai

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    AERODYNAMICS 375 An Airplane Practi

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    UNIT V SECTION 9 AVIGATION IS THE S

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    AVIGATION 379 Aeronautical charts a

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    AVIGATION 381 a chart the distance

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    AVIGAT ION 383 instructors and comm

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    UNIT VI ENERGY MAY BE PROPAGATED TH

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    388 ENERGY MAY BE PROPAC.AIED BY VI

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    390 ENERGY MAY BE PROPAGATED BY VIB

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    392 ENERGY MAY BE PROPAGATED BY VIB

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    F"iG. 170. Theironsshown in this fi

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    396 ENERGY MAY BE PROPAGATED BY VIB

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    UNIT VI SECTION 2 LIGHT MAY BE PROD

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    400 ENERGY MAY BE PROPAGATED BY VIB

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    402 ENERGY MAY BE PROPAGATED BY VIB

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    un ENERGY MAY BE PROPAGATED BY VIBR

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    406 ENERGY MAY BE PROPAGATED BY VIB

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    408 ENERGY MAY BE PROPAGATED BY VIB

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    410 ENERGY MAY BE PROPAGATED BY VIB

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    412 ENERGY MAY BE PROPAGATED BY VIB

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    414 ENERGY MAY BE PROPAGATED BY VIB

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    416 ENERGY MAY BE PROPAGATED BY VIB

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    418 ENERGY MAY BE PROPAGATED BY VIB

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    420 ENERGY MAY BE PROPAGATED BY VIB

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    •5 I o U -a "o ua "o 3 O U s

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    424 ENERGY MAY BE PROPAGATED BY VIB

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    426 ENERGY MAY BE PROPAGATED BY VIB

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    428 ENERGY MAY BE PROPAGATED BY VIB

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    430 ENERGY MAY BE PROPAGATED BY VIB

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    UNIT VI SECTION 5 LIGHT MAY BE REFL

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    434 EN ERGY MAY BE PROPAGATED BY VI

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    436 ENERGY MAY BE PROFAC.ATEI) BY V

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    438 ENERGY MAY BE PROPAGATED BY VIB

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    440 ENERGY MAY BE PROPAGATED BY VIB

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    UNIT VI SECTION 6 ILLUMINATION IS T

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    444 ENERGY MAY BE PROPAGATED BY VIB

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    446 ENERGY MAY BE PROPAGATED BY VIB

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    UNIT VI SECTION 7 SOUND IS PRODUCED

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    — 450 ENERGY MAY BE PROPAGATED BY

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    452 ENERGY MAY BE PROPAGATED BY VIB

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    454 ENERGY MAY BE PROPAGATED BY VIB

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    ' 456 ENERGY MAY BE PROPAGATED BY V

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    458 ENERGY MAY BE PROPAGATED BY VIB

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    UNIT VI SECTION 8 ACOUSTICS IS A PR

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    462 ENERGY MAY BE PROPAGATED BY VIB

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    464 ENERGY MAY BE PROPAGATED BY VIB

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    UNIT VI SECTION 9 SCIENCE AND ART H

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    468 ENERGY MAY BE PROPAGATED BY VIB

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    : 470 ENERGY MAY BE PROPAGATED BY V

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    472 ENERGY MAY BE PROPAGATED BY VIB

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    UNIT VII THE APPLICATIONS OF MAGNET

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    478 MAGNETISM AND ELECTRICITY iron

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    MAGNETISM AND ELECTRICITY A compass

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    482 MAGNETISM AND ELECTRICITY The m

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    UNIT VII SECTION 2 STATIC ELECTRIC

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    486 MAGNETISM AND ELECTRICITY an ex

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    488 MAGNETISM AND ELECTRICITY of th

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    490 MAGNETISM AND ELECTRICITY If a

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    492 MAGNETISM AND ELECTRICITY pheno

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    UNIT VII SECTION 3 AN ELECTRIC CURR

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    496 MAGNETISM AND ELECTRICITY solut

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    408 MAGNETISM AND ELECTRICITY Ohm's

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    5CK) MAGNETISM AND ELECTRIC I IN ^A

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    UNIT VII SECTION 4 THE DISCOVERY OF

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    504 MAGNETISM AND ELECTRICITY A Coi

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    506 MAGNETISM AND ELECTRICITY and t

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    . 508 MAGNETISM AND ELECTRICITY 7.

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    510 MAGNETISM AND ELECTRICITY the f

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    512 MAGNETISM AND ELECTRICITY used.

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    514 MAGNETISM AND ELECTRICITY The t

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    516 MAGNETISM AND ELECTRICITY headl

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    518 MAGNETISM AND ELECTRICITY the n

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    520 MAGNETISM AND ELECTRICITY STUDY

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    522 MAGNETISM AND ELECTRICITY ignit

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    524 MAGNETISM AND ELECTRICITY with

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    526 MAGNETISM AND ELECTRICITY rents

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    528 MAGNETISM AND ELECTRICITY well'

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    530 MAGNETISM AND ELECTRIC ITV read

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    B, ; 532 MAGNETISM AND ELECTRICITY

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    534 MAGNETISM AND ELECTRICITY loud-

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    536 MAGNETISM AND ELECTRICITY frequ

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    I 538 MAGNKTISM AND I:LI{CTRIC1T\ S

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    540 MAGNETISM AND ELECTRICITY The e

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    542 MAGNETISM AND KLKCTRK ITY silve

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    UNIT VII SECTION 9 ELECTRICAL CONDU

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    I 546 MAGNETISM AND ELECTRICITY tub

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    548 MAGNETISM AND KLKCTRICITY that

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    ! 550 MAGNETISM AND FXECTRICITY tha

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    I 552 MAGNETISM AND ELECTRICITY fou

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    i

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    556 MAN IS MASTERING HIS MATERIAL W

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    558 MAN IS MASTERING HIS MATERIAL W

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    . ; 560 MAN IS MASTKRING HIS MATERI

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    562 MAN IS MASTERING HIS MATERIAL W

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    564 MAN IS MASTKRIXG HIS MATKRIAL W

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    I 566 MAN IS MASTERING HIS MATERIAL

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    568 MAN IS MASTKRING HIS MATKRIAL W

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    570 MAN IS MASTERING HIS MATERIAL W

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    572 MAN IS MASTERING HIS MATERIAL W

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    574 MAN IS MASTERING HIS MATERIAL W

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    576 MAN IS MASTERINC; HIS MATERIAL

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    578 MAN IS MASTERING HIS MATERIAL W

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    580 MAN IS MASTERING HIS MATERIAL W

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    582 MAN IS MASTERING HIS MATERIAL W

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    5S4 MAN IS MASTERING HIS MATERIAL W

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    UNIT VIII SECTION 5 ELECTROVALENT R

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    588 MAN IS MASTERING HIS MATERIAL W

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    UNIT VIII SECTION 6 ATOMS DIFFER IN

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    592 MAX IS MASTERING HIS MATERIAL W

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    594 MAN IS MASTERING HIS MATERIAL W

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    596 MAN IS MASTERING HIS MATERIAL W

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    I gain 598 MAN IS MASTERING HIS MAT

  • Page 618 and 619:

    600 MAN IS MASTERING HIS MATERIAL W

  • Page 620 and 621:

    602 MAN IS MASTERING HIS MATERIAL W

  • Page 622 and 623:

    I 604 MAN IS MASTERING HIS MATERIAL

  • Page 624 and 625:

    606 MAN IS MASTERING HIS MATERIAL W

  • Page 626 and 627:

    — : 608 MAN IS MASTERING HIS MATE

  • Page 628 and 629:

    UNIT VIII SECTION 9 COVALENT REACTI

  • Page 630 and 631:

    I I I I I II H H H H 612 MAN IS MAS

  • Page 632 and 633:

    1 H 614 MAN IS MASTERING HIS MATERI

  • Page 634 and 635:

    : I OC I 616 MAN IS MASTERING HIS M

  • Page 636 and 637:

    618 MAN IS MASTERING HIS MATERIAL W

  • Page 638 and 639:

    620 MAN IS MASTERING HIS MATERIAL W

  • Page 641 and 642:

    UNIT IX SECTION 1 OXYGEN AND SULFUR

  • Page 643 and 644:

    OXYGEN AND SULFUR, CARBON AND SILIC

  • Page 645 and 646:

    OXYGEN AND SULFUR, CARBON AND SILIC

  • Page 647 and 648:

    : OXYGEN AND SULFUR, CARBON AND SIL

  • Page 649 and 650:

    OXYGEN AND SULFUR, CARBON AND SILIC

  • Page 651 and 652:

    OXYGEN AND SULFUR, CARBON AND SILIC

  • Page 653 and 654:

    METALLURGY 635 flotation. Many impr

  • Page 655 and 656:

    METALLURGY 637 have been investigat

  • Page 657 and 658:

    METALLURGY 639 twenty years. Copper

  • Page 659 and 660:

    METALLURGY 641 Aluminum and its all

  • Page 661 and 662:

    METALLURGY 643 6. List ten metals a

  • Page 663 and 664:

    COMBUSTION 645 heat is dispersed ne

  • Page 665 and 666:

    Carbon Monoxide Is a Dangerous Pois

  • Page 667 and 668:

    COMBUSTION 649 Huge thermite incend

  • Page 669 and 670:

    COMBUSTION 651 is much used in indu

  • Page 671 and 672:

    COMBUSTION 653 their other properti

  • Page 673 and 674:

    UNIT IX SECTION 4 AIR AND WATER ARE

  • Page 675 and 676:

    AIR AND WATER AS RAW MATERIALS 657

  • Page 677 and 678:

    AIR AND WATER AS RAW MATERIALS 659

  • Page 679 and 680:

    AIR AND WATER AS RAW MATERIALS 661

  • Page 681 and 682:

    AIR AND WATER AS RAW MATERIALS 663

  • Page 683 and 684:

    "BETTER THINGS" FROM CELLULOSE 665

  • Page 685 and 686:

    "BETTER THINGS" FROM CELLULOSE 667

  • Page 687 and 688:

    "BETTER THINGS" FROM CELLULOSE 669

  • Page 689 and 690:

    "BETTER THINGS" FROM CELLULOSE 671

  • Page 691 and 692:

    "BETTER THINGS" FROM CELLULOSE 67 3

  • Page 693 and 694:

    SYNTHETIC PLASTICS 675 of flooring,

  • Page 695 and 696:

    SYNTHETIC PLASTICS 677 furfural in

  • Page 697 and 698:

    SYNTHETIC PLASTICS 679 for textile

  • Page 699 and 700:

    SYNTHETIC PLASTICS 681 elastic qual

  • Page 701 and 702:

    SYNTHETIC PLASTICS 683 natural gas.

  • Page 703 and 704:

    SYNTHETIC PLASTICS 685 powerful int

  • Page 705 and 706:

    SYNTHETIC PLASTICS 687 which is one

  • Page 707 and 708:

    "BETTER THINGS" FROM COAL 689 of 19

  • Page 709 and 710:

    "BETTER THINGS" FROM COAL 691 perfu

  • Page 711 and 712:

    "BETTER THINGS" FROM COAL 693 Coal

  • Page 713 and 714:

    UNIT IX SECTION 8 THE ALREADY VERY

  • Page 715 and 716:

    "BETTER THINGS" FROM PETROLEUM 697

  • Page 717 and 718:

    "BETTER THINGS" FROM PETROLEUM 699

  • Page 719 and 720:

    "BETTER THINGS" FROM PETROLEUM 701

  • Page 721 and 722:

    "BETTER THINGS" FROM PETROLEUM 703

  • Page 723 and 724:

    UNIT IX SECTION 9 NATURAL AND SYNTH

  • Page 725 and 726:

    NATURAL AND SYNTHETIC RUBBERS 707 2

  • Page 727 and 728:

    NATURAL AND SYNTHETIC RUBBERS 709 e

  • Page 729 and 730:

    NATURAL AND SYNTHETIC RUBBERS 711 I

  • Page 731 and 732:

    NATURAL AND SYNTHETIC RUBBERS 713 t

  • Page 733:

    NATURAL AND SYNTHETIC RUBBERS 715 5

  • Page 737 and 738:

    UNIT X SECTION 1 PHOTOSYNTHESIS STO

  • Page 739 and 740:

    I H I H C PHOTOSYNTHESIS STORES ENE

  • Page 741 and 742:

    PHOTOSYNTHESIS STORES ENERGY 723 th

  • Page 743 and 744:

    UNIT X SECTION 2 FOODS ARE THE RAW

  • Page 745 and 746:

    FOODS 727 charged plates which caus

  • Page 747 and 748:

    FOODS 729 to particles which are vi

  • Page 749 and 750:

    FOODS 731 roots by dialysis. The we

  • Page 751 and 752:

    FOODS 733 Plants, like animals, req

  • Page 753 and 754:

    FOODS 735 although the necessity fo

  • Page 755 and 756:

    FOODS 737 regardless of whether the

  • Page 757 and 758: VITAMINS, ENZYMES, AND HORMONES 739
  • Page 759 and 760: Vitamins VITAMINS, ENZYMES, AND HOR
  • Page 761 and 762: VITAMINS, ENZYMES, AND HORMONES 743
  • Page 763 and 764: VITAMINS, ENZYMES, AND HORMONES 745
  • Page 765 and 766: VITAMINS, ENZYMES, AND HORMONES 747
  • Page 767 and 768: VITAMINS, ENZYMES, AND HORMONES 749
  • Page 769 and 770: CHEMICAL WARFARE USED TO COMBAT INS
  • Page 771 and 772: CHEMICAL WARFARE USED TO COMBAT INS
  • Page 773 and 774: CHEMICAL WARFARE USED TO COMBAT INS
  • Page 775 and 776: NATURALLY OCCURRING SOLUBLE SALTS 7
  • Page 777 and 778: NATURALLY OCCURRING SOLUBLE SALTS 7
  • Page 779 and 780: NATURALLY OCCURRING SOLUBLE SALTS 7
  • Page 781 and 782: NATURALLY OCCURRING SOLUBLE SALTS 7
  • Page 783 and 784: NATURALLY OCCURRING SOLUBLE SALTS 7
  • Page 785 and 786: UNIT X SECTION 6 CHEMISTRY HAS PROV
  • Page 787 and 788: C I I C C I I H I — H H C I I I C
  • Page 789 and 790: C I H C I H C H CHEMISTRY AND THE C
  • Page 791 and 792: C I I I H CHEMISTRY AND THE CONTROL
  • Page 793 and 794: CHEMISTRY AND .THE CONTROL OF DISEA
  • Page 795 and 796: UNIT X SECTION 7 THE RELIEF OF PAIN
  • Page 797 and 798: C RELIEF OF PAIN REVOLUTIONIZED SUR
  • Page 799 and 800: C H C II I I H H— H— RELIEF OF
  • Page 801 and 802: I I I I I I I C H H C H C H H RELIE
  • Page 803 and 804: C I H C I H RELIEF OF PAIN REVOLUTI
  • Page 805 and 806: C H C H C I H H RELIEF OF PAIN REVO
  • Page 807: RELIEF OF PAIN REVOLUTIONIZED SURGE
  • Page 811 and 812: " PROTOPLASMIC AND CELLULAR ORGANIZ
  • Page 813 and 814: PROTOPLASMIC AND CELLULAR ORGANIZAT
  • Page 815 and 816: THE PROGRESS OF CIVILIZATION 797 wo
  • Page 817 and 818: THE PROGRESS OF CIVILIZATION 799 to
  • Page 819 and 820: THE PROGRESS OF CIVILIZATION 801 ST
  • Page 821 and 822: CONCLUSION 803 majority of students
  • Page 823 and 824: BIBLIOGRAPHY UNIT I Author Bernal,
  • Page 825 and 826: Author BIBLIOGRAPHY 807
  • Page 827 and 828: Author BIBLIOGRAPHY 809
  • Page 829 and 830: BIBLIOGRAPHY 811 Author National Re
  • Page 831 and 832: BIBLIOGRAPHY 813 Author Rhodes, F.
  • Page 833 and 834: Author BIBLIOGRAPHY 815
  • Page 835 and 836: INDEX Abrasives, 760 Absolute zero,
  • Page 837 and 838: 1 INDEX 819 irreversible, 593 photo
  • Page 839 and 840: INDEX 821 Dynamite, 669 Dynamo, 515
  • Page 841 and 842: INDEX 823 Hardening, 637 Hardness,
  • Page 843 and 844: INDEX 825 Local anaesthetics, 771,
  • Page 845 and 846: INDEX 827 Periodicity, 568 Periodic
  • Page 847 and 848: INDEX 829 Roentgen, W. R., 546 Roll
  • Page 849 and 850: INDEX 831 Thunderstorms, 268, 489 T
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