CONTENTS xvii 



PAGE 



' Goethe's Anticipations of Coming Scientific Ideas.' 

 (Address to the Goethe Society at Weimar on June n.) 



Deutsche Rundschau, LXXII 403 



Fiftieth Anniversary of his degree 404 



Correspondence with Heinrich Hertz .... 405 



Death of Werner von Siemens 406 



' Electromagnetic Theory of Colour Dispersion/ (Berlin 

 Academy.) Wiedemann* s Ann., XLVIII .... 407 



'Additions and Corrections to the Essay: Electro- 

 magnetic Theory of Colour Dispersion/ Wiedemann's 

 Ann., XLVIII 407 



1893. 'Address to E. du Bois-Reymond drawn up on behalf 



of the Royal Academy of Sciences ' 409 



'Conclusions from Maxwell's Theory as to the Move- 

 ments of pure Ether.' (Berlin Academy) . . . .411 



Note : ' How one may imagine the Movement of the 

 Ether in Maxwell's Theory of Electrodynamics to take 



place' . . .411 



Journey to the Exhibition at Chicago .... 412 

 Accident on his return 418 



1894. Death of Heinrich Hertz on Jan. i 419 

 ' Supplement to the Essay : On the Principle of Least 



Action in Electrodynamics.' (Berlin Academy) . . . 425 

 Note : ' Further Researches on the Completeness of the 



unknown Electrodynamic Forces.' 



' On the Origin of the Correct Interpretation of our 



Sensual Impressions.' Zeitsch. f. Psycho/, u. Physiol. d. 



Sinnesorgane, VII . . . . . . . . 426 



Hertz proposed by Helmholtz for the Prize of the Peter 



Muller Foundation ........ 428 



Commencement of illness on July 12 .... 429 



Death on Sept. 8 430 



Note: 'Address to Naturalists' 430 



Commemoration at the Academy of Music on Dec. 14 . 437 



1899. Unveiling of the Statue in front of the University on 



June 6 . 438 



Death of Mrs. von Helmholtz on Dec. i . . . . 439 



1901. Death of his son Fritz on Nov. 17 .... 440 



