SYSTEM NAPHTHALENE-CHLOROBENZENE-PHEXOL, ETC. 39 



Fusion Curve Xo. ô. 



Jx +.0153 +.0160 +.0134 +.0091 +.0075 



Isotherm 51.04°. 



Jx .000 +.004 +.014 +.016 +.011 +.014 +.011 



In tlie foregoing table the values of x observed were obtained by 

 graphical interpolation from their respective curves in Plate I 

 and accordingly they are given with only three figures. 



On the whole the deviations are one-sided, and seems to be 

 greatest at about the middle of the surface. The limit of error, 

 considering the effects of heat capacity, surpereooling and tem- 

 perature reading, seems to be 2 or 3 units in the third decimal 

 of X, while the error from vaporisation of the mixture which 

 reached 0.1-0.2 a;rammes out of 30-40 «'rammes of the total 

 solution will cause an error of ö-Q units in the third decimal 

 at the lower temperatures, yet this error is constant and common 

 to all the curves including curve No. 1, from which JSf has been 

 calculated, and will have little influence upon the values of 

 X as compared above. Hence the deviations in the above two 



