﻿Theory of Freezing Mixtures. 



Hence, if S is small, -, can be substituted for - 



1-4 S 

 whence w 



789 



and therefore 



M^ 



zO ' 



3(T-fS) 



20 



I+S 



m- 1 ^ and 

 50 



This result is applicable, provided S<£ 



On the other hand, if I is small compared with S, one obtains 



50 " 



These results indicate that the cryohydric temperature will 

 be attained, provided 



(i.) B*A(^8) 

 and • (ii.) I<# -(I + S). 

 This is in agreement with ordinary experience, though the 

 fact that they do not both totally disappear is usually 

 attributed to the substances not having been taken in the 



Fig. 1. 













































* 



# 













f 



















', 



1 



\ 



6 

















', 



I 



! 



















1 \ 



;f 



















\ l 



i! 



















» T 



;' 



















*» d) 



.' 



















■\ 





















•■ 



° to 20 30 *K) 5o 6o yo 8o c/o 'OO 

 Percentage of Salt. 



-e 9- T/ieor^/ca/ 



-X--X-- £xf,er,-me-nraJ. 



proper proportions. The above work, however, shows that 

 no such "proper" proportion exists; and, in fact, the 

 experimental results are of the kind one would expect 

 according to theory. 



In fig. 1 this range is represented by the central horizontal 

 portion of the curve. 



