260 



K. IKEDA 



TABLE II.— Continued. 



The average difference between the observed and the calculated 



values of KV Y , and therefore of K, in the first table is ± 1.85% ; 



i 

 while the similar difference in the values of K*V 118 in the second 



table is not more than 0.90 %> the agreement being much closer. 

 The value of K calculated therefrom is, however, again about the same 

 as that in the first table, viz., 1.8 %• 



These results are more satisfactory than those obtained by 

 Schiff" s formula, which gives values of N differing from the observed 

 values by 3.5% on the average; and as Nia proportional to K, it 

 may be observed that the average difference between the experimental 

 and the calculated values of K according to the formulae here pro- 

 posed is only one-half of the similar difference which obtains between 

 the values of N when Schiff' s formula is employed. In the first table 

 there are four instances of great discrepancies, ranging from 7.4 to 

 9.0 %. Of these, isoamyl-formate has an exceptionally large value 

 for I\\ it being about 6 °L higher than the average value of four of its 

 isomers, while its molecular volume given by Schiff seems to be too 

 high by two per cent., so that there is some reason to believe that a 

 careful redetermination of these data might remove this discrepancy. 

 The next case is bromine, of which it is sufficient to remark that this 

 element might possibly have two capillary constants as its brother 



This is calculated from Frankenheim's determination. 



