﻿Attraction of Unlike Molecules. 



17 







• Values of X Q 2 . 







H 2 and C 3 H (! 2 . 



OAO, 



C 5 H 10 O 2 . 



C 6 H 12 2 . 



C 7 H u 2 . 





146 



145 



144 



144 



144 



Air and 



235 



237 



241 



243 



245 



CO and 



383 



389 



395 



401 



405 



H 2 and0 8 H 16 O 2 . 



°9 H 18 2' 



(C 2 H 5 ) 2 0. 



cs . 



C 6 H 6 . 





145 



144 



134 



153 



169 



Air and 



248 



247 



219 



241 



276 



CO and 



411 



413 



361 



393 



453 



Winkelmann's determinations include a number of isomers, 

 as, for instance, propyl formate, ethyl acetate, and methyl 

 propionate of the composition C 4 H 8 2 ; and in the diffusion- 

 coefficients about to be given I have taken the mean of the 

 isomers in each case, so that, for instance, the mean diffusion- 

 coefficient of the bodies just mentioned is given as the value 

 for C 4 H 8 2 . When the broad principles have been established 

 it will be time enough to take account of minor differences in 

 the diffusion-coefficients of isomers. The following table 

 contains the mean diffusion-coefficients obtained from Winkel- 

 mann's determinations at the temperatures of his experiments, 

 and the values at 0° C. calculated by the last formula and the 

 values of T C 2 just given. 



Substance diffusing into 



C 3 H 6 2 

 <W> a 



C 5 H 10 O 2 

 C 6 H 12 2 



C 7 H u 2 



C 8 H 16 2 



C H 18 O 2 



(C 2 H 5 ) 2 



cs 2 



C 6 H 6 ... 



T. 



319-2 



293-4 



273 



339-8 



3191 



273 



364 



339-8 



273 



369-5 



3397 



273 



371 



273 



371 



273 



371 



273 



292-9 



283-4 



273 



305-8 



292-9 



273 



318 



292-9 



273 



BL 



D. 



•446 

 •390 

 •341 

 •440 

 •390 

 •292 

 •418 

 •383 

 •258 

 •410 

 •349 

 •235 

 •380 

 •218 

 •343 

 •197 

 •318 

 •182 

 •341 

 •320 

 •298 

 •463 

 •425 

 •371 

 •399 

 •341 

 •297 



Air. 



D. 

 •112 

 •100 



•087 

 •111 

 •100 

 •074 

 •112 

 •099 

 •065 

 •106 

 •087 

 •057 

 •095 

 •053 

 •085 

 •047 

 •078 

 •043 

 •089 

 •083 

 •078 

 •112 

 •101 

 •088 

 •101 

 •088 

 •076 



CO, 



D. 

 •075 

 •067 

 •057 

 •078 

 •069 

 •050 

 •081 

 •069 

 •043 

 •075 

 •062 

 •039 

 •068 

 •036 

 •061 

 •033 

 •057 

 •030 

 •064 

 •060 

 •055 

 •079 

 •073 

 •063 

 071 

 •061 

 •052 



Phil. Mag. S. 5. Vol. 38. No. 230. July 1894. C 



