230 : O. U. VONWILLER. 
r? r 167r (a + d) atd) . 
ea —— | — lop seen a 
U area plied C= a? 1 Pad 
when Cis the capacity of the condenser, r the radius of 
the plates, d their thickness, and a the distance between 
them. The resulting curve between capacities and the 
ratio 1000 6s/ep is shown in Fig. 2. 
Z 
Bean 
Ne2aee8 
tet a 
y) 
ba oo | 
Ki I 5 = & 5 R 
S Ss R g 8 R 8 NS S : 5 
b 
| SJ) 
1000 | “75 
)p 
