6 CONTENTS 



CHAP. PAGE 



XVII. CONTRIBUTIONS TO MOLECULAR PHYSICS . . . .407 



XVIII. LIFE AND LETTERS OF FARADAY 430 



XIX THE COPLEY MEDALIST OF 1870 ...... 444 



XX. THE COPLEY MF.nAT.TRT OF 1871 451 



XXI. DEATH BY LIGHTNING 462 



XXII. SCIENCE AND THE "SPIRITS" ... . .467 



