CONTENTS. 



PAOK 



PREFACE TO THIRD EDITION - - vii 



INTRODUCTION, LISTS OF COMMITTEES, &c. - ix 



LIST OF CONTRIBUTORS, WITH ADDRESSES - xxix 



SECTION 1. ARITHMETIC - ... 1 



2. GEOMETRY - - - - 15 



3. MEASUREMENT - - 42 



4. KINEMATICS, STATICS, AND DYNAMICS - 131 



5. MOLECULAR PHYSICS - - 155 



6. SOUND- - - - 178 



7. LIGHT - - - 203 



8. HEAT - - - 252 



9. MAGNETISM - - - - - . 279 



10. ELECTRICITY - - 298 



11. ASTRONOMY - - 391 



12. APPLIED MECHANICS - 444 



13. CHEMISTRY - - 563 

 14. METEOROLOGY .... 573 

 15. GEOGRAPHY ... 725 



16. GEOLOGY AND MINING * 815 



17. MINERALOGY, CRYSTALLOGRAPHY, &c. - 884 



18. BIOLOGY - - 900 



19. EDUCATIONAL APPLIANCES - - 1004 



20. MISCELLANEOUS - - - 1064 



