CONTENTS 



CHAPTER PAOE 



PREFACE vii 



I THE BEGINNINGS OF KNOWLEDGE .... 1 



II THE MACHINES OF THE ANCIENTS .... 14 



III WEIGHTS AND MEASURES 24 



IV THE BEGINNINGS OF SCIENCE 35 



V THE BEGINNINGS OF EXPERIMENTATION ... 48 



VI THE REALITIES OF SCIENCE 60 



VII THE MOLECULAR COMPOSITION OF MATTER . . 70 



VIII THE ELECTRON 88 



IX ENERGY 101 



X SOME USES OF MATHEMATICS 115 



XI RATES 128 



XII FORCE, A SPACE RATE OF ENERGY . . . 139 



XIII MOLECULAR MOTIONS AND TEMPERATURE . . 155 



XIV MOTIONS OF ELECTRONS 173 



XV THE INTERACTIONS OF MOVING ELECTRONS . . 195 



XVI THE CONTINUITY AND CORRESPONDENCE OF MOLEC- 

 ULAR STATES 217 



XVII MOLECULAR MIXTURES 234 



XVIII ELECTROLYTIC DISSOCIATION 244 



XIX EQUILIBRIA AND THEIR DISPLACEMENT . . . 257 



XX MOLECULAR MAGNITUDES 270 



XXI MOLECULAR ENERGY 288 



XXII ELECTRONIC MAGNITUDES 304 



INDEX 323 



xi 



