CONTENTS 





CHAP. PAGE 



I PHYSICAL PROPERTIES AND STATES OF MATTER ... 1 



II UNITS OF LENGTH, AREA, AND VOLUME 21 



III UNITS OF TIME, VELOCITY, AND ACCELERATION . . 34 



IV MASS AND ITS MEASUREMENT 44 



V MATTER IN RELATION TO MOTION 55 



VI PARALLEL FORCES AND CENTRE OF GRAVITY .... 74 



VII PRINCIPLE OF ARCHIMEDES AND RELATIVE DENSITY . 91 



VIII ATMOSPHERIC PRESSURE AND BOYLE'S LAW 106 



IX WORK AND ENERGY 118 



X HEAT 133 



XI LIGHT 160 



XII CONSTRUCTION OF SIMPLE VOLTAIC CELLS 184 



XIII CHEMICAL CHANGES INDUCED BY THE ELECTRIC 



CURRENT . 198 



