DISCHARGE FROM METALLIC SURFACES IN DIFFERENT GASES. 449 
C 
<D 
13 
o 
)0- 
0- 
0- 
0 - 
D- 
)- 
—r- 
TbOm^-h 
r_j 
Y.- 
^ ] 
760mm.H 
cir 
Sw. 
i_ 
3 
CJ) 
U 
0 
3 
) 
j 
) 
) 
J 
mr. 
— 
co^ 
r 
Pressur 
30 mms, 
Fig. 7. 
CelLs. 
Table YI. 
Potential.- 
Fig. 8. 
120 i50 
Cells. 
Potential to 
which zinc is 
charged in cells. 
4 
20 
40 
60 
80 
100 
120 
140 
160 
180 
1 . 
( Current from zinc surface in electrometer scale divisions in 10 seconds in_ 
Air. 
Ho. 
CO 2 . 
18 millims. 
6 millims. 
18 millims. 
6 millims. 
18 millims. 
j 6 millims. 
36 
49 
32 
47 
65 
84 
78 
118 
60 
93 
104 
130 
I — 
143 
— 
140 
_ 
158 
1 116 
166 
96 
253 
139 
225 
1 132 
243 
111 
459 
_ 
335 
149 
450 
142 
_ 
165 
164 
— 
205 
_ 
178 
358 
_ 
215 
216 
— ; 
— 
_ 
282 
282 
— 
- , 
375 
“ i 
i 
.Yo^e,s\—Tlie experiments were carried out in the small leak apparatus, the zinc 
electrode being situated 3-5 millims. behind the gauze. A P.D. of 1 volt between the 
electrometer quadrants corresponded to a deflection of 77 divisions. 
This set of observations was one of the last taken and the spark used was so 
constant as to render the use of a second apparatus as a check quite unnecessary, the 
VOL. COIL—A. 3 
