( 636 ) 



TABLE III. 



Ka Cl. 



i„ = / calculated from the lowering of the freezing point 

 f' =: » )) •» » diminution of the vapour ten.sion. 



method Avhicli socmcd so very accurate, tlioiigli he continued tlie 

 experiments up to the concentration 1 gr. mol.-. Jonks and (xetman, 

 however, fonnd a strongly })rononnced minimum lyijig at the con- 

 centration =t 0.1 gr. mol., whereas the determinations of the vaiioiii- 

 tension give a minimum at i 0.5 gr. mol. 



I have already }»()inted out in a previons [)aper ^), that only for 

 the case that ue have to deal with e.rceedim/Ii/ (I'duteil solntions the 

 value of / calculated from the lowering of the freezing j)oint must 

 be in harmony ^\•ith that calculated from the diminution of the vapour 

 tension. 



For the calculation of / from the lowering of the freezing point 



the following eipialion is used: 



S K 

 iQ=AT (1) 



and for the calculation of / from the diminution of the vapour tension, 

 we applied the equation 



^i) = — • — 



2\ *' 



For exceedingly diluted solutions ig = W ov 



(2) 



Lp N S N 



Po 



Rl\ 



or 



^ 



Po ^^^'o 



(3) 

 (4) 



1) These Proc. Ill, Febr. 23 1901, p. 507, 



