!4 
MR. W. CASSIE ON THE EFFECT OF TEMPERATURE ON 
its conductivity was so great that no deflection could be obtained. All except 
paraffin oil showed a decrease of speciflc inductive capacity with rise of temperature. 
The paraffin oil was that used in the lamps in the Laboratory, and its exceptional 
behaviour may have been due to some secondary action arising from impurity. 
The results are given in the following tables and diagram. And to show the way 
in which the observations were made, the readings are given for turpentine at two 
temperatures. 
Ratio of specific 
inductive capacity 
Temperature. 
to that at the 
lowest tempera- 
Rate of decrease. 
ture. 
Tiirpeiitme: 
20° C. 
1-0000 
36 
•9800 
•0012 
49 
•9700 
•0011 
62 
•9600 
•0009 
Carbon bisnlpbide: 
15 
1-0000 
35 
•9130 
•0040 
43 
•8940 - 
•0040 
Glycerine : 
18 
1-0000 
41 
•8500 
•0060 
61 
•7760 
•0053 
Benzylene: 
19 
1-0000 
41 
•9870 
•0006 
52 
•9640 
•0011 
63 
•9350 
•0015 
Benzene: 
15 
1-0000 
39 
•9665 
•0014 
58-5 
■9507 
•0012 
Olive oil; 
17 
1-0000 
38 
•9530 
•0021 
51 
•9140 
•0025 
59 
•9130 
•0021 
68 
•8670 
•0026 
