CONTENTS BY CHAPTERS 



CHAPTER PASE 



IX. THE REPRODUCTION OF ILLUSTRATIONS . . . 184 



X. PHOTOGRAPHY IN ITS SCIENTIFIC ASPECTS . . . 22O 



XI. PAINTS, DYES, AND VARNISHES ..... 258 



APPENDIX 323 



VOLUME IX 



INGENUITY AND LUXURY 



I. AN INDUSTRIAL REVOLUTION ..... 5 



II. THE MANUFACTURE OF TEXTILES .... 38 



HI. THE STORY OF COSTUMES 58 



IV. THE SEWING-MACHINE 87 



V. CLOTHING THE EXTREMITIES ..... 103 



VI. THE EVOLUTION OF THE DWELLING HOUSB . . . 133 



VII. THE MODERN SKYSCRAPER 162 



VIII. ARTIFICIAL STONE, OR CONCRETE .... 182 



IX. FURNITURE AND FURNISHINGS ..... 213 



X. THE PRODUCTS OP CLAY AND FIRE . . . .227 



XI. GLASS AND GLASS-MAKING 277 



XII. GEMS, NATURAL AND ARTIFICIAL .... 295 



APPENDIX . 333 



VOLUME X 



THE SCIENCE OF HAPPINESS 



PART I. THE PROBLEM OF HAPPINESS AND ITS PHYSICAL 



ASPECTS 



I. THE PROBLEM OF HAPPINESS , .5 



II. PHYSICAL NEEDS . . . . . . . .21 



III. SOUND BODIES ........ 41 



IV. HOW TO SLEEP ........ 6l 



PART II. MENTAL ASPECTS OF THE PROBLEM OF HAPPINESS 



V. HOW TO SEE AND REMEMBER ..... 85 



VI. HOW TO THINK . * " . . . . . . 103 



VII. THE WILL AND THE WAY ...... 123 



VIII. SELF KNOWLEDGE . . . . . . 135 



'PART in. SOCIAL ASPECTS OF THE PROBLEM OF HAPPINESS 



IX. HOW TO WORK ......... 149 



X. YOUTH VERSUS AGE . . . . . . .167 



XI. GOLD VERSUS IDEALS 185 



XII. VOCATION VERSUS AVOCATION . . . . -195 



PART IV. MORAL ASPECTS OF THE PROBLEM OF HAPPINESS 



XIII. LIFE COMPANIONSHIP . . . . . . . 213 



XIV. THE COMING GENERATION . . . . . .231 



XV. HOW TO INVITE HAPPINESS 243 



XVI. HOW TO DIE . ' '.; ' * 257 



APPENDIX AND INDEX 273 to 350 



