xiv CONTENTS 



PAGE 



1878. 'The Facts in Perception/ Address on Foundation 

 Day of the University of Berlin ... 3 12 



A 'Telephone and Timbre/ (Berlin Academy.) Wiede- 

 l mann's Ann., V ... . 3 T 4 



' On the Signification of the Convergent Position of the 

 Eyes for the Purpose of determining the Distance of 

 Objects seen binocularly/ (Berlin Physiol. Soc.) 

 Journey to Italy .... . 314 



' Prefatory Note to a posthumous Treatise of Franz Boll : 

 Theses and Hypotheses concerning Light and Colour 

 Sensation/ Du Bois-Reymond y s Archiv, 1881. 



1879. 'Studies on Electrical Boundary Layers.' IViede- 

 mann's Ann., VII ... 3 1 ? 



Heinrich Hertz at Helmholtz's Physical Institute . . 321 



1880. 'On the Motional Currents on Polarized Platinum/ 

 (Berlin Academy.) Wiedemann's Ann., XL 



Journey to Spain ... . 323 



1881. 'On the Forces acting on the Interior of magnetically 

 or dielectrically polarized Bodies/ (Berlin Academy.) 

 Wiedemann's Ann., XIII . 329 



Note on the Theory of Attractions within Magnetizable 

 or Dielectric Media . 329 



'An Electrodynamic Balance/ Wiedemann's Ann., XIV. 



Journey to England .... . 330 



' On the Modern Development of Faraday's Conception 

 of Electricity/ Faraday Lecture to the Chemical Society, 

 London 330 



Note: Observations supplementary to the Faraday 

 Lecture 33 1 



Note: 'On the Electrodynamic Theory of Optical 

 Phenomena/ 



Journey to Paris to take part in the Electrical Congress . 332 



Journey to Florence and to the Electrical Exhibition in 

 Vienna 333 



' On the Deliberations of the Paris Congress concerning 

 Electrical Units/ (Lecture, Berlin Electro-technical Society) 333 



' On Galvanic Polarization of Mercury and on Recent 

 Experiments by Mr. Arthur Konig relating to it/ (Berlin 



Academy) 333 



1882. Appearance of the Wissenschaftliche Abhandlungm, 

 Vol. I; 1883, Vol. II 334 



