426 Proceedings of Poyal Society of Edinburgh. 
than the corresponding leakage for oxygen. The appended curves 
show the peculiarities of the leakage in the different gases (dia- 
gram 10). 
§ 33. Leakage in different gases at different atmospheric 
pressures. 
The method of filling the glass bulb with any given gas, and the 
way in which the different vacuums were obtained, has been 
described in § 30. 
Diagram 10. 
The following tables give the results obtained with the gases we 
have up till now experimented on. 
Air. 
a. 
Atmospheric 
Pressure in 
mms. 
0. 
Leakage per 
min. for 
4 Volts. 
7- 
Leakage for 
96 Volts. 
0 
a 
7 
a 
760 
100 
131 
•132 
•172 
240 
44 
46 
•183 
•192 
190 
40 
39 
•210 
•205 
121 
24 
26 
•197 
■214 
64 
12 
13-5 
•187 
•212 
58 
11 
io-o 
•189 
•172 
23 
4-4 
3-75 
•191 
•163 
3*6 
1-2 
1-2 
•339 
•339 
