326 
PEOEESSOE W. G. ADAMS AND ME. E. E. DAT ON THE 
Another and more complete set of observations made with No. 10, the temperature 
being constant, while the battery-power was varied, gave the following results : — 
Interval in 
minutes. 
Direction of 
current. 
Resistance in 
megohms. 
Number of cells. 
0 
5-50 ) 
2 
+ 
5-00 I 
4 
I 
— 
5-40 f 
2 
+ 
4-90 J 
5 
_ 
5-20 -) 
1 
+ 
4-70 1 
6 
1 
— 
5-15 f 
3 
+ 
4-70 J 
6 
+ 
4-80 I 
2 
— 
5-13 1 
3 
+ 
4-72 f 
2 
— 
5-13 J 
3 
_ 
5-13 ~) 
2 
1 
+ 
4- 69 1 
5- 03 f 
10 
2 
+ 
4-50 J 
3 
+ 
4-62 1 
1 
2 
+ 
4-95 1 
4-55 f 
12 
1 
— 
4-91 J 
4 
_ 
4-96 -) 
3 
+ 
4-53 [ 
14 
2 
— 
4-93 f 
1 
+ 
4-49 J 
4 
+ 
4-53 9 
1 
— 
4-90 1 
16 
2 
+ 
4-43 f 
3 
— 
4-77 J 
5 
— 
4-92 1 
4 
1 
+ 
4-43 ! 
4-81 r 
18 
1 
+ 
4-35 j 
2 
+ 
4-41 9 
2 
1 
+ 
4-77 I 
4-31 f 
20 
1 
- ' 
4-74 J 
Another set of observations, No. 15 being the tube used, gave the following results : — 
