324 
PROFESSOR W. G. ADAMS AND MR. R. E. DAT ON THE 
Direction of current. 
Resistance in 
megohms. 
Temperature. 
+ 
4-650 
°C. 
11 
3-600 
11 
— 
3-800 
16-5 
+ 
4-825 
17 
— 
4-275 
20 
+ 
5-314 
20 
— 
4-620 
21 
+ 
5-533 
21 
In the next series of observations the battery-power was again kept constant, being 
that of 20 Leclanche’s cells in series, and the temperature of the inclosure was varied. 
Direction of current. 
Resistance in 
megohms. 
Temperature. 
+ 
4-61 
°C. 
10-3 
3-66 
„ 
+ 
8-05 
30 
— 
7-90 
„ 
— 
7-58 
25-8 
+ 
7-72 
„ 
+ 
7-54 
23-5 
- 
7*20 
” 
In the next series the temperature was kept nearly constant, while the number of 
cells in the Leclanche’s battery was varied. 
Direction of current. 
Resistance in 
megohms. 
Temperature. 
Number of cells. 
°0. 
+ 
4-105 
10-5 \ 
20 
- 
3-280 
» X 
+ 
4-190 
10-6 \ 
15 
— 
3-335 
» X 
+ 
4-330 
10-8 1 
10 
— 
3-410 
» X 
_ 
3-670 
109 1 
c: 
+ 
4450 
» i 
O 
In the next series the temperature of the enclosure was kept constant at 13° C., while 
the battery-power was varied. It was also thought advisable to take two pairs of 
observations for each change of battery-power, and to note the interval of time between 
every two observations. 
