6 



CONTENTS 



CHAP. 



XVII. Contributions to Molecular Physics 

 XVIII. Life and Letters of Faraday 

 XIX. The Copley Medalist of 1870 

 XX. The Copley Medalist of 1871 

 XXI. Death by Lightning . 

 XXII. Science and the "Spirits" • 



PAOB 



. 407 



. 420 



. 444 



e 451 



. 462 



. 467 



