CONTENTS xv 



PAGE 



' The Thermodynamics of Chemical Processes.' (Berlin 

 Academy) . . . 335 



1883. Note on an Introduction to Thermodynamics . . 340 

 ' The Determination of Magnetic Moments by means of 



the Balance/ (Berlin Academy.) Note thereon. 



Correspondence with Heinrich Hertz .... 344 

 Journey to Rome to take part in the Geodetic Congress . 347 



1884. Journey to England 348 



Marriage of his daughter Ellen to Arnold Wilhelm von 



Siemens 349 



' Studies on the Statics of Monocyclic Systems/ (Berlin 

 Academy) . . 349 



'Generalization of the Theorems on the Statics of 

 Monocyclic Systems/ (Berlin Academy) .... 350 



' Principles of the Statics of Monocyclic Systems/ 

 Crelle's Journ., XCVII ... ... 350 



' On the Physical Signification of the Principle of Least 

 Action/ Crelle's Journ., C, 1886 350 



'On the History of the Discovery of the Principle of 

 Least Action/ (Address to the Berlin Academy) . . 350 



1885. Handbook of Physiological Optics. Second edition. 

 1885-1895 . ... 363 



'Report on Sir William Thomson's Mathematical and 

 Physical Papers, Vols. I and II.' Nature, XXXII . . 364 



1886. The Quincentenary of the University at Heidelberg . 365 



Conferment of the Graefe Medal 365^ 



'On the Formation of Clouds and Thunderstorms/ 



(Physical Society) 367 



Appointed Vice- Chancellor of the ' Peace ' Class of the 



Order ' Pour le merite ' 368 



Correspondence with Heinrich Hertz .... 368 



1887. Foundation of the Imperial Physico-Technical Institute, 

 Berlin 369 



'Experiment to demonstrate the Cohesion of Fluids/ 

 (Physical Society.) 



' Joseph Fraunhofer : Address on the occasion of the 

 Centenary of his Birth/ 



' Further Researches concerning the Electrolysis of 

 Water/ (Berlin Academy.) Wiedemanrts Ann., XXXIV 375 



'On an Ice Machine working with Pictet's Fluid/ 

 (Berlin Phys. Soc.) 



