1 
494 MESSRS. W. DE LA RUE AND H. W. MULLER ON THE 
Tube 150 CO 3 (17 aluminium rings). 
8540 cells; full potential 403 divisions. 
The positive pole of the battery connected to No. 1 ring; the negative pole and the 
17th ring to earth. Each ring in. succession was connected to electrometer. 
i Rinr. 
Pressure 3'33 millimetres. 
Potential. 
Pressure 1'33 millimetres. 
Potential. 
Pressure 0 - 8 millimetre. 
Potential. 
Pressure 0'34 millimetre.* 
Potential. 
Divisions. 
Cells. 
Ratio. 
Divisions. 
Cells. 
Ratio. 
Divisions. 
Cells. 
Ratio. 
Divisions. 
Cells. 
Ratio. 
1 
206 
4366 
9-8 
165 
3497 
7-5 
112 
2373 
4'5 
90 
1907 
1-3 
2 
168 
3560 
8-0 
149 
3158 
6-8 
107 
2268 
4-3 
80 
1695 
1-2 
3 
158 
3349 
7-5 
128 
2713 
5-8 
99 
2098 
4-0 
70 
1484 
10 
4 
148 
3137 
7-0 
128 
2713 
5-8 
98 
2077 
3-9 
76 
1611 
11 
5 
138 
2925 
6-6 
119 
2522 
5-4 
94 
1992 
3-8 
76 
1611 
PI 
6 
124 
2628 
5-9 
109 
2310 
5-0 
88 
1865 
3-5 
75 
1590 
IT 
7 
111 
2353 
5-2 
98 
2077 
4-5 
82 
1738 
33 
75 
1590 
IT 
8 
99 
2098 
4-7 
92 
1950 
4-2 
77 
1632 
31 
74 
1568 
IT 
9 
87 
1844 
4-1 
82 
1738 
3'7 
71 
1505 
2-8 
73 
1547 
IT 
10 
77 
1632 
37 
72 
1526 
33 
64 
1356 
2-6 
72 
1526 
IT 
11 
65 
1377 
31 
65 
1377 
2-9 
58 
1229 
2-3 
70 
1484 
1-0 
12 
53 
1123 
2-5 
55 
1166 
2-5 
52 
1103 
21 
69 
1462 
l'O 
13 
42 
890 
2-0 
47 
996 
2T 
45 
954 
1-8 
68 
1441 
1-0 
14 
32 
678 
1-5 
38 
805 
17 
33 
805 
1-5 
67 
1420 
1-0 
15 
26 
551 
1-2 
29 
615 
1-3 
31 
657 
1-2 
67 
1420 
1-0 
16 
21 
445 
1-0 
22 
466 
1-0 
25 
530 
1-0 
67 
1420 
l-o 
17 
0 
0-0 
0 
o-o 
0 
o-o 
A 
o-o 
Pressure 0’067 millimetre. 
Pressure 0‘008 millimetre. 
Distance between 17th and the 
Ring. 
Potential. 
Potential. 
following rings 
Divisions. 
Cells. 
Ratio. 
Divisions. 
Cells. 
Ratio. 
Inches. 
Centims. 
Ratio. 
1 
90 
1907 
1'2 
104 
2204 
12 
3210 
81-5 
16-44 
2 
93 
1971 
1-2 
96 
2034 
1-2 
3010 
76-4 
1511 
3 
87 
1844 
11 
94 
1992 
11 
28-20 
71-6 
14-44 
4 
89 
1887 
11 
92 
1950 
11 
26-02 
66-1 
13-34 
5 
87 
1844 
11 
91 
1929 
11 
24-15 
61-3 
12-37 
6 
86 
1823 
11 
93 
1971 
11 
22-05 
56-0 
11-30 
7 
86 
1823 
11 
92 
1950 
11 
20-00 
50-6 
10-24 
8 
85 
1801 
11 
90 
1907 
11 
18-00 
45-7 
9-22 
9 
86 
1823 
11 
90 
1907 
11 
16-10 
40-9 
8-24 
10 
85 
1801 
11 
89 
1887 
11 
1412 
35-8 
7-24 
11 
83 
1759 
11 
87 
1844 
10 
1212 
30-8 
6’22 
12 
82 
1738 
11 
85 
1801 
10 
10-02 
25-4 
5-13 
13 
79 
1674 
1-0 
86 
1823 
1-0 
7-92 
20-1 
4'06 
14 
79 
1674 
l-o 
85 
1801 
1-0 
5-90 
15'0 
3-03 
15 
78 
1653 
l-o 
83 
1759 
10 
3-90 
9-9 
2-00 
16 
78 
1653 
1-0 
83 
1759 
l-o 
1-95 
4-9 
1-00 
17 
0 
0-0 
0 
01 
* Pressure of minimum resistance 0’34 millimetre. 
