Law of Chemical Attraction between Atoms. 83 



Similar relations can o£ course easily be derived for other 

 forms of stress, torsion or hydrostatic pressure. We have only 



Fig. 3. 



I r o rt , 

 Nickel, 



to substitute for F the twisting couple or hydrostatic pressure 

 and for dx change of angle or of volume. But the change of 

 magnetization produced by hydrostatic pressure is only of the 

 same order as the change of volume produced. Hence in 

 this case no agreement can be expected ; the order of 

 magnitude is, however, given correctly. 



XIII. An Investigation of the Determinations of the Law of 

 Chemical Attraction between Atoms from Physical Data. 

 By R. D. Kleeman, D.Sc, B.A., Mackinnon Student of 

 the Royal Society *. 



IN this paper the writer proposes to investigate to what 

 extent the law of chemical attraction can be derived 

 from latent heat, surface tension, and other physical pro- 

 perties of substances ; and an endeavour will be made to place 

 the whole subject on a sound mathematical basis. This is 

 highly desirable as different investigators have obtained 

 different laws for the attraction. These laws will be briefly 

 discussed and compared with the results obtained in this 

 paper. 



* Communicated by the Author. 

 G2 



