CONTENTS xiii 



PAGE 



'On the Theory of Electrodynamics.' Part II : Critical 

 notes. Crelle's Journal, LXXV, 1873 .... 289 



1 Comparison of Ampere's and Neumann's Law regarding 

 Electrodynamic Forces.' (Berlin Academy) . . . 289 



'On the Theory of Electrodynamics.' Part III : Electro- 

 dynamic Forces in Moving Conductors. Crelle's Journal, 

 LXXVIII, 1874 . . ... 289 



' Experiments on Electromotive Forces induced by 

 Motion in an Open Circuit.' (Berlin Academy) . . 291 



'On Galvanic _ Polarization of Platinum.' (Leipzig 

 Naturforscher-Versammlung) 294 



' On Galvanic Polarization in Fluids free from Gas.' 

 (Berlin Academy.) (Trans.) Phil. Mag. [4], XLVII . . 294 



' Report on the Experiments of Dr. E. Root of Boston 

 concerning the Penetration of Platinum by Electrolytic 

 Gases.' (Berlin Academy.) (Trans.) Phil. Mag., 1876 . 295 



'Report on Experiments on the Electromagnetic Effect 

 of Electrical Convection, carried out~by M r. "Henry A. 

 Rowland.' (Berlin Academy.) (Trans.) Phil. Mag., 1876 . 295 



Note on the Theory of Electrodynamics .... 295 



1873. 'On a Theorem concerning geometrically similar 

 Movements of Fluid Bodies, and its Application to the 

 Problem of steering Air-balloons.' (Berlin Academy) . 296 



' The Theoretical Limit of the Efficiency of Microscopes.' 

 Pogg. Ann., 1874 . . 299 



1874. 'Contribution to the Theory of Anomalous Dis- 

 persion.' (Berlin Academy.) Pogg. Ann., CLIV, 1875 . 300 



1875. 'Whirlwinds and Thunderstorms.' (Lecture, Ham- 

 burg.) Deutsche Rundschau, 1876 301 



Death of Robert von Mohl 302 



1877. Appointed Professor of Physics at the Military 

 Institute for Medicine and Surgery, Berlin . . . 304 



' On Thought in Medicine.' Lecture translated in Pop. 

 Sci. Lect., Series II 304^ 



Death of his daughter Kathe 305 



'On Academical Freedom in the German Universities.' 

 Rectorial Address, translated in Pop. Sci. Lect., Series II . 306 



' On Galvanic Currents caused by Differences in Con- 

 centration : Deductions from the Mechanical Theory of 

 Heat.' Wiedemann's Ann., Ill; Phil. Mag., 1878 . . 309 



