X CONTENTS. 



CHAPTER PAUU4 



XVIII. LIFE AND LETTERS OP FARADAY. . . . 399 



XIX. THE COPLEY MEDALLIST OP 1870 . . 422 



XX. THE COPLEY MEDALLIST OP 1871 . . . 429 



XXI. DEATH BY LIGHTNING . . 439 



XXII. SCIENCE AND THE SPIRITS 444 



MAP 



Bli OWING THE PARALLEL ROADS OF GLEN BOY . tO/OCep. 227 



