508 



Frederick Guthrie on some Thermal and 



Ether arid Chloroform. 

 Maximum Rise of Temperature. 

 § 270. The liquids were weighed instead of being measured; 

 otherwise they were treated as in § 269, with the exception 

 that two experiments were made in each case ; in the second 

 experiment the thermometer-bulb was brought to the tempe- 

 rature shown in the first experiment before being used. 



Table LXII. 



Showing Rise of Temperature from 17° # 6 on mixing Ether 



and Chloroform in different proportions by weight. 



Ether. 



Chloroform. 



Rise in temperature. 



2 



Per. cent. 

 1 or 33-33 



1 „ 50-00 

 1-615 „ 61-8 



2 „ 66-66 



3 „ 75-00 



4 „ 80-00 



o 



8-0 

 11-0 



11-7 (O 4 H 10 O : CHC1 3 ) 

 11 "5 

 10-9 



9-6 



As we are here merely searching for a maximum, we may 

 neglect certain effects which would be of the utmost import- 

 ance under other circumstances. Thus the specific heat of 

 none of the liquids is the same, and each rise of temperature 

 given is weighted with the specific heat of the liquid in which 



Fte. 5. 



Percent. •> 10 20 30 40 50 60 7<» 80 



V 



