xiv CONTENTS 



PAGE 



1878. 'The Facts in Perception/ Address on Foundation 

 Day of the University of Berlin 312 



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

 mann's Ann., V 314 



' 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's Archiv, 1881. 



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

 mann's Ann., VII . . . . . . . . 317 



Heinrich Hertz at Helmholtz's Physical Institute . . 321 



1880. 'On the Motional Currents on Polarized Platinum.' 

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



Journey to Spain 323 



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

 or dielectrically polarized Bodies/ (Berlin Academy.) 

 Wiedemanris 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 331 



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 Abhandlungen, 

 Vol.1; 1883, Vol. II 334 



