CONTENTS 



CHAPTER PAGE 



I. THE EARTH'S PLACE IN THE UNIVERSE 13 



II. THE EARTH'S NEAREST NEIGHBORS: THE MOON AND THE 



PLANETS 33 



III. MATTER AND ITS PROPERTIES 46 



IV. FORCE AND MOTION: PHYSICAL STATES OF MATTER . . 56 

 V. HEAT: ITS DISTRIBUTION AND MEASUREMENT .... 71 



VI. LIQUIDS AND THEIR PROPERTIES 81 



VII. PROPERTIES OF GASES; THE ATMOSPHERE; ATMOSPHERIC 



PRESSURE ..... . 93 



V11I. WEATHER; WINDS AND STORMS; CLIMATE 107 



IX. LIGHT .V ........ 120 



X. ELECTRICITY AND MAGNETISM 128 



XI. How MATTER CHANGES . . . .-...-;. 138 



XII. THE COMMON ELEMENTS OF THE EARTH . 147 



XIII. SOME COMPOUNDS OF COMMON ELEMENTS 158 



XIV. MINERALS AND ORES: THEIR VALUE AND SOURCE . . 167 

 XV. THE CRUST OF THE EARTH, MAN'S STOREHOUSE . . . 177 



XVI. CONTINENTS; OCEANS ..." 190 



XVII. MOUNTAINS; MINING; FORESTRY 202 



XVIII. TOPOGRAPHIC MAPS . . 216 



XIX. EARTHQUAKES; VOLCANOES 225 



XX. RIVERS AND THEIR WORK 233 



XXI. GLACIERS AND LAKES 244 



