216 
MR. J. ZELENY ON THE VELOCITY OF THE IONS 
Table YII.—Dry Air. Summary for Large Inner Cylinder. 
Reference 
number. 
X. 
U. 
A. 
T. 
Tempera¬ 
ture. 
Gas 
pressure. 
Ionic velocity. 
Negative. ■ Positive. 
i 
1 
5-4 
10-7 
- 1-90 
•50 
°c. 
11-8 
75-9 
1-43 
2 
5-4 
12-6 
-2-23 
•43 
12-4 
75-9 
1-43 
— 
3 
5-4 
12-7 
+ 2-84 
•43 
12-4 
75-9 
— 
1T3 
4 
5-4 
10-4 
+ 2-35 
•52 
12-4 
75-9 
1T0 
5 
3-77 
11-55 
+ 3-75 
•33 
15 
75-8 
— 
1Y2 
6 
3-77 
11-55 
-2-70 
•33 
15 
75-8 
T555 
— 
7 
3-77 
11-65 
-2-80 
•33 
15 
75-8 
1-51 
— 
8 
5T1 
13-9 
-2-64 
•37 
15-4 
76-8 
1-43 
— 
9 
5T1 
13-95 
+ 3-39 
•37 
15-4 
76-8 
— 
1T15 
10 
3-26 
13-8 
-4-06 
•24 
15'4 
76-8 
1-57 
— 
11 
6-35 
8-83 
-1-48 
•72 
16 
77-2 
1-315 
— 
12 
6-35 
8-83 
+ 1-80 
•72 
16 
77-2 
— 
T08 
13 
6-35 
14-05 
+ 2-80 
•45 
15-8 
76-0 
— 
T09 
14 
6-35 
14-2 
-2-20 
•45 
15-8 
76-0 
1-40 
— 
15 
2-63 
14-9 
-4-7 
T8 
15-8 
76-0 
1-65 
— 
16 
2-63 
7-7 
+ 3-5 
•34 
16-3 
75-9 
— 
1T4 
17 
2-63 
7-04 
- 2‘5 
•37 
16-3 
75-9 
1-465 
— 
18 
2-63 
13-9 
-4-32 
•19 
16-3 
75-9 
1-67 
— 
19 
2-63 
14-06 
+ 5-94 
T9 
16-3 
75-9 
— 
1-23 
The results are represented in fig. 9. 
