JS 7 otices respecting JSfeiv Books. 187 



Society. The fine photographic reproductions of portraits in oil 

 of " Fellows of immortal fame in science " will be greatly appre- 

 ciated by all readers of the book. We may add that the price 

 (4s. 6d.) at which the book is published appears to us ridiculously 

 low ; and this fact should materially aid in securing for the work 

 the wide circulation which it is highly desirable that it should have. 



Abhandlungen ilber Theoretische Physilc. Von H. A. Lorentz, 

 Professor an der Universitat Leiden. Erster Band. Erste 

 Lieferung. Mit 8 Eiguren im Text. Leipsic and Berlin : 

 B. a. Teubner. 1906. Pp. 298. 

 All physicists will welcome the appearance of the Collected Papers 

 of Professor H. A. Lorentz, of which the first volume has now- 

 been issued. This contains 10 papers, in three different languages^ 

 for — as the author says in his brief prefatory note — " we Dutchmen 

 are forced to write in foreign languages if we would take part in 

 the common scientific work of the nations.*' The first paper, in 

 English, is entitled " Some Considerations on the Principles of 

 Dynamics, in connexion with Hertz's ' Prinzipien der Mechanik,* " 

 and is a critical examination of Hertz's dynamical method . 

 Paper II., in German, deals with the motion of a viscous liquid, 

 and Paper III., in the same language, with the origin of turbulent 

 motion in liquids, and the effect of turbulent motion on the flow 

 through pipes. Paper IV. (French) is on the equations of motion 

 of a gas and the propagation of sound according to the kinetic 

 theory of gases. Papers V., VI., VII., VIII., and X., which are 

 all in German, deal with the application of the virial theorem to 

 the kinetic theory of gases, with the equilibrium of the kinetic 

 energy of gaseous molecules, with the magnitude of regions in 

 n-dimensional space, with the entropy of a gas, and with the virial 

 theorem respectively. Paper IX. (French) is on the molecular 

 theory of dilute solutions. Of special interest to advanced students 

 is Paper XI., which occupies nearly one-third of the entire volume, 

 and which is based on the author's lectures ; this deals with the 

 Second Law of thermodynamics, and with its relation to molecular 

 theories. All the papers have been carefully revised by the author. 

 The appearance of the next instalment of papers is promised 

 shortly. 



Leitfaden der Wetterh uncle. G-emeinverstandlich bearbeitet von Dr. 

 E. Bobnsteln-, Professor an der Konigl. Landwirtschaftlichen 

 Hochschule zu Berlin. Mit 61 in den Text eingedruckten 

 Abbildungen und 22 Tafeln. Zweite umgearbeitete und ver- 

 mehrte Auflage. Braunschweig : F. Vieweg unci Sohn. 1906. 

 Pp. xii + 232. 



The first edition of this excellent manual was noticed in these 

 columns some five years ago. The fact that a second edition has 

 now been called for is ample proof of the fact that there is a wide- 

 spread interest in meteorology, and that the author of the present 



