Forces of Attraction between Atoms and Molecules. 787 

 Table III. 



Name of liquid. 



2/3 

 P 



T 1/2 „ 23 

 2 / 3 ^ /— 



m l/2 2/3 



T m 



2 / 3 ^ 



p 5y 



Ether 



398-3 

 290-2 

 434-2 

 415-9 

 427-3 

 522-6 

 5709 

 517-6 

 607-3 

 491-5 

 428-4 

 559-7 

 6236 



14-3 

 153 

 15-9 

 15-5 

 14-2 

 15-1 

 15-4 

 14-9 

 13-3 

 15-5 

 14-6 

 15-2 

 14-3 

 15-1 

 14-5 

 13-4 

 18-1 

 14-2 

 140 

 140 

 13-7 

 13-6 

 13-6 

 13-5 

 14-5 

 14-6 



13-3 

 14-5 

 13-5 

 13-9 

 130 

 13-4 

 13-6 

 136 

 121 

 13-7 

 134 

 140 

 125 

 130 

 13-3 

 12-9 

 16-0 

 13-2 

 131 

 130 

 12-7 

 12-6 

 12-6 

 12-5 

 136 

 13-7 





Carbon tetrachloride 



Benzene 







lodo-benzene 



Stannic chloride 



Di-isobutyl 



Cbloro-benzene 





Heptane 







495-1 

 425-5 

 4654 

 448-8 

 422-4 

 417-9 

 416-6 

 482-8 

 4801 

 4796 

 476-7 

 3541 

 3553 



Isopentane 



Di-isopropyl* 



Propyl form ate 



Ethyl acetate 



Methyl propionate 





Ethyl propionate 



Methyl butyrate 



Methyl isobutyrate 



Methyl acetate 



Ethyl formate 



From equation (5) we have that the ratios 



/' 



12 



sy 



??ii V 



(T and f( 



'my 6 



should each be constant for corresponding states. These ratios 

 are evaluated for a number of liquids in Table IV. (p. 788). 

 They are approximately constant as we should expect from 

 the foregoing results. But the deviations from constancy 

 are greater than when %c a is used instead of S ^m l or 2v, 

 as will be seen by comparing the table with that given in the 

 Phil. Mag. p. 904, Dec. 1909. 



We thus conclude from the foregoing discussion that the 

 constant Sc a may be replaced by either 2 */m x or %v, and on 

 the whole a fair agreement with the facts obtained. The small 

 deviations obtained with normal liquids are very probably in 

 part due to slight polymerization, which one would expect 

 to exist in the case of every liquid in a degree depending on 

 its nature. 



3E 2 



