CONTENTS xiii 



PAGE 



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

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



'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 Mr. 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 3 



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 



