48 AKT. 12. — H. HIKOBE : ON THE FUSION SUKFACES OF THE 



clicmical species CeHßO. If our hypothesis be correct -^ must 



be constant at each temperature. This is approximately the case 

 shown in tlie last columns of the foregoing tables. 



The ratio has indeed the tendency to increase with the 

 decrease of the concentration. In the calculation of Ci the value 

 of 9i, from fusion curve Xo. 1 was employed and as may be seen 

 from Table 14, K increases with the decreasing concentration, so 

 this result corresponds to that deduced from the fusion surface. 



The ratio -^ increases rapidly with the decreasing con- 

 centration at all temperatures. That the ratio -^ is nearly 



constant at G4.o0° must be looked upon as accidental. This de- 

 monstrates how dangerous it is to draw theoretical conclusions 

 from observations at a single temperature. 



In the foregoing calculations the amount of water taken up 

 by the oily phase has been left out of consideration. In the 

 solutions in which the concentration of phenol is small, this can 

 have no significance ; but in the other cases the effect may not 

 be altogether negligible. In order to be aljle to estimate this 

 disturbing effect, the quantity of water absorbed by the 50% 

 solution of phenol in chlorobenzene was determined in the follow- 

 ing manner. A very thin graduated pipette (0.00597 c.c. for 

 1 division and one drop corresponding to about 2 divisions) was 

 employed to add water to the phenol solution until a slight 

 turbidity occurred. The solution was then shaken with 20 c.c. 

 of the salt solution in the thermostat at 45°. The clear oil was 

 sucked from the bottle and after being cooled, water was again 

 added until turbidity occurred again. The diiferenco of the 

 quantity of water in these two titrations gives the quantity of 

 water absorbed I'rom the salt solution at 45'^. 19.90 c.c. of 



