596 MAN IS MASTERING HIS

596 MAN IS MASTERING HIS MATERIAL WORLD power, their valence is said to be zero. rewritten to show valence changes: The above reaction may now be Valence 2(+ 2 - 2) 2 Ha + O2 >- 2H2O In this case hydrogen, H2, has changed in valence from zero to 2 X (+ 1). It has therefore increased in valence. Inasmuch as hydrogen is oxidized in the above reaction, an increase in valence must therefore be oxidation. By the same reasoning the loss in valence of oxygen must be reduction. We now have a new and more general definition of oxidation and reduction. Oxidation is the increase in the positive valence, while reduction is a decrease in positive valence. Thus many reactions which involve neither oxygen nor hydrogen are still oxidation-reduction reactions because the valences of elements are changed in these reactions; in fact every reaction in which there is a change of valence is an oxidation-reduction reaction. The term oxidation-reduction reaction is used because in every reaction which involves oxidation there is always a loss in positive valence by one atom which exactly equals the gain in positive valence of another. An example of an oxidation-reduction reaction which involves no oxygen or hydrogen is given as follows: when a globule of mercury is rolled over a sheet of paper covered with mercuric chloride, HgCh, it leaves a fluorescent path when exposed to ultraviolet light because the mercury forms mercurous chloride, HgCl, which, unlike mercuric chloride, HgCb, is fluorescent. Valence + 2-2 2(+ 1 - 1) HgCl2 + Hg —3- 2 HgCl mercuric chloride mercury mercurous chloride In this case the mercuric mercury is changed to mercurous mercury; when metals have two valences, the lower valence is indicated by the suffix 0W5 as in mercnrous or cuprous, and the higher valence is indicated by the sufftx ic as in mercuric and cuprzc. This reaction represents a decrease in positive valence and is therefore reduction. The free mercury increases in positive valence and is therefore oxidized. According to the electron theory, changes in valence are the result of a loss or gain of electrons; thus oxidation and reduction fundamentally involve a gain or loss of electrons by atoms or ions. Inasmuch as an increase in positive valence is oxidation and inasmuch as this change is accomplished by the loss of electrons, oxidation is the loss of electrons or de-electronization, as the process is sometimes called. Reduction must therefore be a gain of electrons, or electronization.

i gain — ELECTRON TRANSFER 597 Oxidizing and Reducing Agents Are Substances Which Gain and Lose Electrons. The separation of metals from their compounds in metallurgy is essentially a process of reduction, because electrons must be added to the metal in the compound to set it free. Coal is used to reduce iron ore: gain of electrons I i 2(+3-3) ^0 3(+4-4) 2Fe203 + 3C —>- 4Fe + 3 CO2 iron oxide carbon (coal) iron carbon dioxide I loss of electrons J An electric current is a stream of electrons and therefore serves as a reducing agent. Sodium, aluminum, magnesium, and other metals which have a relatively poor attraction for electrons are best separated from their compounds by electrolysis. These metals separate at the cathode because electrons are given off at this pole. Nonmetals have a relatively high attraction for electrons, but these elements may be separated from their compounds at the anode by electrolysis because electrons are removed from substances at the anode. Chlorine, bromine, iodine, and oxygen may be prepared by electrolysis. Oxygen has an attraction for electrons which is greater than that of chlorine, and oxygen may therefore be used to liberate chlorine from its compounds. Chlorine, in turn, has an attraction for electrons which is greater than that of iodine, and chlorine will therefore liberate iodine from its compounds. of electrons 5- +1-1 +1-1 CI + Nal —>- I + NaCl chlorine sodium iodide iodine sodium chloride I loss of electrons f In electrolysis, reduction takes place at the cathode and oxidation takes place at the anode. In the reaction I loss of electrons ^ 2( + 2-2) 2(H2) + O2 —>- 2(H20) I gain of electrons ^ hydrogen loses electrons, and oxygen gains electrons. Similarly, in the reaction of sodium with water, sodium goes into solution to form sodium ions, Na"^, losing electrons in the process, while hydronium ions, (HaO)^, accept electrons and form water and hydrogen gas. ["O loss of electrons T 2 Na + 2(0H)-, 2(H30)+ ^2 Na+ 2(0H)- + H2 + 2 H2O I gain of electrons J

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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
Page 114 and 115:
96 THE UNIVERSE A VAST SYSTEM OF PA
Page 116 and 117:
98 THE UNI\'i:i
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100 THE UNIVERSE A VAST SYSTEM OF P
Page 120 and 121:
102 THK I'MX i:KSh: A VAST SWSri-.M
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104 THE UNIVERSE A VAST SYSTEM OF P
Page 124 and 125:
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
Page 253 and 254:
THE KINETIC- MOLECULAR THEORY 235 2
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THE KINETIC-MOLECULAR THEORY 237 Th
Page 257 and 258:
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
Page 311 and 312:
ENERGY MANIFESTS ITSELF IN MANY FOR
Page 313 and 314:
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
Page 319 and 320:
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
Page 335 and 336:
MACHINES HAVE RAISED LIVING-STANDAR
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MACHINES HAVE RAISED LIVING-STANDAR
Page 339 and 340:
MACHINES HAVE RAISED LIVING-STANDAR
Page 341 and 342:
TRANSPORTATION HAS BEEN REVOLUTIONI
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TRANSPORTATION HAS BEEN REVOLUTIONI
Page 345 and 346:
TRANSPORTATION HAS BEEN REVOLUTIONI
Page 347 and 348:
THE INTERNAL-COMBUSTION ENGINE 329
Page 349 and 350:
THE INTERNAL-COMBUSTION ENGINE 331
Page 351 and 352:
THE INTERNAL-COMBUSTION ENGINE 333
Page 353 and 354:
THE INTERNAL-COMBUSTION ENGINE 335
Page 355 and 356:
THE INTERNAL-COMBUSTION ENGINE 337
Page 357 and 358:
THE INTERNAL-COMBUSTION ENGINE 339
Page 359 and 360:
UNIT V SECTION 6 THE AUTOMOBILE TYP
Page 361 and 362:
THE AUTOMOBILE 343 consolidations o
Page 363 and 364:
THE AUTOMOBILE 345 same survey show
Page 365 and 366:
THE AUTOMOBILE 347 tenance costs in
Page 367 and 368:
THE AUTOMOBILE 349 Buying oil on th
Page 369 and 370:
THE AUTOMOBILE 351 STUDY QUESTIONS
Page 371 and 372:
AIRPLANE A TRIUMPH OF MODERN SCIENC
Page 373 and 374:
AIRPLANE A TRIUMPH OF MODERN SCIENC
Page 375 and 376:
AIRPLANE A TRIUMPH OF MODERN SCIENC
Page 377 and 378:
AIRPLANE A TRIUMPH OF MODERN SCIENC
Page 379 and 380:
AIRPLANE A TRIUMPH OF MODERN SCIENC
Page 381 and 382:
AIRPLANE A TRIUMPH OF MODERN SCIENC
Page 383 and 384:
UNIT V SECTION 8 FLYING AN AIRPLANE
Page 385 and 386:
AERODYNAMICS 367 Weight, i.e.^ a me
Page 387 and 388:
AERODYNAMICS 369 The Venturi tube i
Page 389 and 390:
AERODYNAMICS 371 An airfoil is any
Page 391 and 392:
AERODYNAMICS 373 right. After attai
Page 393 and 394:
AERODYNAMICS 375 An Airplane Practi
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UNIT V SECTION 9 AVIGATION IS THE S
Page 397 and 398:
AVIGATION 379 Aeronautical charts a
Page 399 and 400:
AVIGATION 381 a chart the distance
Page 401 and 402:
AVIGAT ION 383 instructors and comm
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UNIT VI ENERGY MAY BE PROPAGATED TH
Page 406 and 407:
388 ENERGY MAY BE PROPAC.AIED BY VI
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390 ENERGY MAY BE PROPAGATED BY VIB
Page 410 and 411:
392 ENERGY MAY BE PROPAGATED BY VIB
Page 412 and 413:
F"iG. 170. Theironsshown in this fi
Page 414 and 415:
396 ENERGY MAY BE PROPAGATED BY VIB
Page 416 and 417:
UNIT VI SECTION 2 LIGHT MAY BE PROD
Page 418 and 419:
400 ENERGY MAY BE PROPAGATED BY VIB
Page 420 and 421:
402 ENERGY MAY BE PROPAGATED BY VIB
Page 422 and 423:
un ENERGY MAY BE PROPAGATED BY VIBR
Page 424 and 425:
406 ENERGY MAY BE PROPAGATED BY VIB
Page 426 and 427:
408 ENERGY MAY BE PROPAGATED BY VIB
Page 428 and 429:
410 ENERGY MAY BE PROPAGATED BY VIB
Page 430 and 431:
412 ENERGY MAY BE PROPAGATED BY VIB
Page 432 and 433:
414 ENERGY MAY BE PROPAGATED BY VIB
Page 434 and 435:
416 ENERGY MAY BE PROPAGATED BY VIB
Page 436 and 437:
418 ENERGY MAY BE PROPAGATED BY VIB
Page 438 and 439:
420 ENERGY MAY BE PROPAGATED BY VIB
Page 440 and 441:
•5 I o U -a "o ua "o 3 O U s
Page 442 and 443:
424 ENERGY MAY BE PROPAGATED BY VIB
Page 444 and 445:
426 ENERGY MAY BE PROPAGATED BY VIB
Page 446 and 447:
428 ENERGY MAY BE PROPAGATED BY VIB
Page 448 and 449:
430 ENERGY MAY BE PROPAGATED BY VIB
Page 450 and 451:
UNIT VI SECTION 5 LIGHT MAY BE REFL
Page 452 and 453:
434 EN ERGY MAY BE PROPAGATED BY VI
Page 454 and 455:
436 ENERGY MAY BE PROFAC.ATEI) BY V
Page 456 and 457:
438 ENERGY MAY BE PROPAGATED BY VIB
Page 458 and 459:
440 ENERGY MAY BE PROPAGATED BY VIB
Page 460 and 461:
UNIT VI SECTION 6 ILLUMINATION IS T
Page 462 and 463:
444 ENERGY MAY BE PROPAGATED BY VIB
Page 464 and 465:
446 ENERGY MAY BE PROPAGATED BY VIB
Page 466 and 467:
UNIT VI SECTION 7 SOUND IS PRODUCED
Page 468 and 469:
— 450 ENERGY MAY BE PROPAGATED BY
Page 470 and 471:
452 ENERGY MAY BE PROPAGATED BY VIB
Page 472 and 473:
454 ENERGY MAY BE PROPAGATED BY VIB
Page 474 and 475:
' 456 ENERGY MAY BE PROPAGATED BY V
Page 476 and 477:
458 ENERGY MAY BE PROPAGATED BY VIB
Page 478 and 479:
UNIT VI SECTION 8 ACOUSTICS IS A PR
Page 480 and 481:
462 ENERGY MAY BE PROPAGATED BY VIB
Page 482 and 483:
464 ENERGY MAY BE PROPAGATED BY VIB
Page 484 and 485:
UNIT VI SECTION 9 SCIENCE AND ART H
Page 486 and 487:
468 ENERGY MAY BE PROPAGATED BY VIB
Page 488 and 489:
: 470 ENERGY MAY BE PROPAGATED BY V
Page 490 and 491:
472 ENERGY MAY BE PROPAGATED BY VIB
Page 493:
UNIT VII THE APPLICATIONS OF MAGNET
Page 496 and 497:
478 MAGNETISM AND ELECTRICITY iron
Page 498 and 499:
MAGNETISM AND ELECTRICITY A compass
Page 500 and 501:
482 MAGNETISM AND ELECTRICITY The m
Page 502 and 503:
UNIT VII SECTION 2 STATIC ELECTRIC
Page 504 and 505:
486 MAGNETISM AND ELECTRICITY an ex
Page 506 and 507:
488 MAGNETISM AND ELECTRICITY of th
Page 508 and 509:
490 MAGNETISM AND ELECTRICITY If a
Page 510 and 511:
492 MAGNETISM AND ELECTRICITY pheno
Page 512 and 513:
UNIT VII SECTION 3 AN ELECTRIC CURR
Page 514 and 515:
496 MAGNETISM AND ELECTRICITY solut
Page 516 and 517:
408 MAGNETISM AND ELECTRICITY Ohm's
Page 518 and 519:
5CK) MAGNETISM AND ELECTRIC I IN ^A
Page 520 and 521:
UNIT VII SECTION 4 THE DISCOVERY OF
Page 522 and 523:
504 MAGNETISM AND ELECTRICITY A Coi
Page 524 and 525:
506 MAGNETISM AND ELECTRICITY and t
Page 526 and 527:
. 508 MAGNETISM AND ELECTRICITY 7.
Page 528 and 529:
510 MAGNETISM AND ELECTRICITY the f
Page 530 and 531:
512 MAGNETISM AND ELECTRICITY used.
Page 532 and 533:
514 MAGNETISM AND ELECTRICITY The t
Page 534 and 535:
516 MAGNETISM AND ELECTRICITY headl
Page 536 and 537:
518 MAGNETISM AND ELECTRICITY the n
Page 538 and 539:
520 MAGNETISM AND ELECTRICITY STUDY
Page 540 and 541:
522 MAGNETISM AND ELECTRICITY ignit
Page 542 and 543:
524 MAGNETISM AND ELECTRICITY with
Page 544 and 545:
526 MAGNETISM AND ELECTRICITY rents
Page 546 and 547:
528 MAGNETISM AND ELECTRICITY well'
Page 548 and 549:
530 MAGNETISM AND ELECTRIC ITV read
Page 550 and 551:
B, ; 532 MAGNETISM AND ELECTRICITY
Page 552 and 553:
534 MAGNETISM AND ELECTRICITY loud-
Page 554 and 555:
536 MAGNETISM AND ELECTRICITY frequ
Page 556 and 557:
I 538 MAGNKTISM AND I:LI{CTRIC1T\ S
Page 558 and 559:
540 MAGNETISM AND ELECTRICITY The e
Page 560 and 561:
542 MAGNETISM AND KLKCTRK ITY silve
Page 562 and 563:
UNIT VII SECTION 9 ELECTRICAL CONDU
Page 564 and 565: I 546 MAGNETISM AND ELECTRICITY tub
Page 566 and 567: 548 MAGNETISM AND KLKCTRICITY that
Page 568 and 569: ! 550 MAGNETISM AND FXECTRICITY tha
Page 570 and 571: I 552 MAGNETISM AND ELECTRICITY fou
Page 572 and 573: i
Page 574 and 575: 556 MAN IS MASTERING HIS MATERIAL W
Page 576 and 577: 558 MAN IS MASTERING HIS MATERIAL W
Page 578 and 579: . ; 560 MAN IS MASTKRING HIS MATERI
Page 580 and 581: 562 MAN IS MASTERING HIS MATERIAL W
Page 582 and 583: 564 MAN IS MASTKRIXG HIS MATKRIAL W
Page 584 and 585: I 566 MAN IS MASTERING HIS MATERIAL
Page 586 and 587: 568 MAN IS MASTKRING HIS MATKRIAL W
Page 588 and 589: 570 MAN IS MASTERING HIS MATERIAL W
Page 590 and 591: 572 MAN IS MASTERING HIS MATERIAL W
Page 592 and 593: 574 MAN IS MASTERING HIS MATERIAL W
Page 594 and 595: 576 MAN IS MASTERINC; HIS MATERIAL
Page 596 and 597: 578 MAN IS MASTERING HIS MATERIAL W
Page 598 and 599: 580 MAN IS MASTERING HIS MATERIAL W
Page 600 and 601: 582 MAN IS MASTERING HIS MATERIAL W
Page 602 and 603: 5S4 MAN IS MASTERING HIS MATERIAL W
Page 604 and 605: UNIT VIII SECTION 5 ELECTROVALENT R
Page 606 and 607: 588 MAN IS MASTERING HIS MATERIAL W
Page 608 and 609: UNIT VIII SECTION 6 ATOMS DIFFER IN
Page 610 and 611: 592 MAX IS MASTERING HIS MATERIAL W
Page 612 and 613: 594 MAN IS MASTERING HIS MATERIAL W
Page 616 and 617: 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 and 808:
RELIEF OF PAIN REVOLUTIONIZED SURGE
Page 809 and 810:
PROTOPLASMIC AND CELLULAR ORGANIZAT
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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