CINEOL A8 A SOLVENT IN CRYOSCOPY. 



469 



to = weight of solute used (in grammes). 

 W = weight of solvent used (in grammes). 

 The solutes used were Kahlbaum's in the case of benzo- 

 phenone, nitrobenzene, bromobenzene, toluene, benzene, 

 butyl alcohol, and were used without further purification. 

 The chloroform used was Mercks'. The ethyl alcohol used 

 was Mercks', and was distilled after being in contact with 

 quicklime for twenty-four hours. The ether was Kahlbaum's 

 and was distilled after being in contact with sodium for 

 twenty-four hours. 



TABLE T. 

 Solute: — Benzophenone (C 6 H 5 ) 2 CO; m = 182. 

 Weight of solvent (cineol) = 14-258 grammes. 



w. 



Percentage of 

 solute to solvent. 



A 



K. (calculated) 



0-1186 

 0-2026 

 0-2752 

 0-3870 



0-832 

 1-421 

 1-930 

 2-714 



0-308 

 0-532 

 0-696 

 1-044 



6-7 

 6-8 

 6-6 

 7-0 

 Average 6*75 



TABLE II. 



Solute: — Nitrobenzene, C 6 H 5 N0 2 ; m 

 Weight of cineol = 16*06. 



123. 



w. 



Percentage of 

 solute. 



A 



K. (calculated) 



0-2054 

 0-2946 

 0-5068 

 0-6572 



1-279 

 1-834 

 3-156 

 4-092 



0-655 

 0-953 

 1-651 

 2-176 



6-4 

 6-4 



6-4 



6-6 



Average 6*45 



TABLE III. 



Solute: — Bromobenzene, 6 H 5 Br- 



m = 157. 



W= 16-02. 



w. 



Percentage of 

 solute. 



A 



K. 



0-197 

 0-3444 



0-4872 

 0-6386 



1-23 

 2-15 

 3-04 

 3-98 



0-54 

 0-949 

 1-317 

 1-703 



6-9 

 6-9 

 6-8 

 6-7 

 Average 6-8 



