270 
Mr. A. Tribe on the Distribution of 
ascertained, quantitatively, the distribution of negative electri- 
city on a rectangular silver plate, by determining the amount 
on successive surfaces of equal area, and also on successive 
surfaces of equal length, measured from the apex of a diamond- 
shaped plate of the same metal. The plates were in the 
position in the electrolytic field indicated in the above sub- 
title, and were under similar conditions as to the strength of 
electrolyte, current, &c. 
The bare experimental data given in my former paper 
become much more instructive when the figures express the 
quantity of electricity found on equal areas of the respective 
plates, as is done in the following table. For convenience of 
comparison, the quantity on the end surface of the rectangle 
is taken as 100, and all the other equal areas are calculated to 
this standard. 
Distance in millimetres ' 
from the end facing 
+ electrode. 
On the rectangular 
plate. 

to 2 
2 
„ 4 
4 
„ 6 
6 
„ 8 
8 
„ 10 
Ki 
., 12 
12 
„ 14 
14 
„ 16 
16 
„ 18 
18 
„ 20 
20 
„ 22 
22 
„ 24 
1000 
64-8 
524 
42-7 
36-5 
30-3 
25-5 
207 
158 
7-6 
trace 
On the diamond 
plate. 
1966 
423 
220 
161 
147 
124 
88 
74 
51 
38 
24 
The distribution of positive electricity was, at the same time, 
determined on a cylinder of pure copper ; and taking the 
electricity found on the rounded end of the conductor as ]00, 
the quantities on approximately equal areas of the other parts 
were as shown below: — 
Distance in millimetres 
from the end facing 
— electrode. 
to 2 
1000 
2 .. 4 
45-7 
4 ., 6 
347 
6 „ 8 
295 
8 „ 10 
24-1 
10 „ 12 
19-6 
12 „ 14 
17-5 
14 „ 16 
14-7 
16 „ 18 
12-8 
18 „ 20 
106 
20 „ 22 
8-9 
22 „ 24 
6-6 
