MOLECULAR ATTRACTION.* 



(SECOND PAPER.) 



BY J. B. MILL8. 



REVIEW OF THE THEORY. 



This paper presents additional evidence tending- to show 

 that the attraction between molecules varies inversely as the 

 square of their distance apart and does not vary with the tem- 

 perature. Considering the attraction as a property belong- 

 ing to each molecule, or to be more exact, a mutual property 

 of each pair of molecules, it must vary as the mass, larg-e 

 numbers of similar molecules being- here considered. Briefly 

 therefore this paper is an attempt to show that the law of 

 gravitation holds, not only between masses, but between the 

 molecules of a substance, and that this law is alone sufficient 

 to account for the phenomena of the internal latent heat of 

 vaporization. 



The assumptions upon which the present work is based are 

 stated in the original paper, 1 and it would not be necessary 

 here specifically to call attention to them were it not for the 

 fact that certain reviews have overlooked the significance of 

 the preliminary statements to that paper. We may say that 

 the steps leading- up to the present work are briefly: — 



1. The kinetic theory of gases and van 't Hoff's applica- 

 tion of the gas law PV = RT to solutions. 



2. The conclusion from the above theories and related 

 work that the average translational energy of g-aseous and 

 liquid molecules must at the same temperature be equal, 



•Reprinted from the Journal of Physical Chemistry, Vol. 8, No. 6, 

 June, pp. 383-415 (1904). 



1 Jour. Phys. Ohem. 6, 209 (1902). 



80 [Nov. 



