THE NEW THEORY OF SOLUTIONS. 



409 



solutions. The concentrations of the solutions employed 

 varied between 1 and 5 gram-molecules of substance per 

 5000 gr. of ether. 



The average value of C is 7 1 and the mean divergence is 

 only 'oi, although the dissolved substances belong to families 

 of widely different chemical character and have molecular 

 weights, which in the extreme cases are in the ratio of 1 to 9. 



Influence of the chemical nature of the solvent. — Raoult 

 further found empirically that if M be the molecular weight 

 of the solvent, C, the molecular lowering, is practically 

 equal to M/100. The mean values of C obtained from 

 observations on different substances dissolved in twelve 

 different solvents are compared in the following table with 

 the corresponding values of M/100. 



