236 
Mr. G. Owen on the Discharge of 
(1) Discharge of Electricity from the Filament at Atmo- 
spheric Pressure; Variation of the Leak with the 
Potential. 
At atmospheric pressure the positive and negative leaks 
increase with the potential put on the filament. 
The results 
obtained at atmospheric pressure are given in Table I. During 
the whole course of the experiments several filaments were 
used. 
TABLE I. 
The number of the filament used in this series of 
Negative Leak. 
Filament I. 
Date | R. 
1904. | ohms. 
| Keb. 27 54) 100 
60 
| 
30 
0 
| 
aS 
=e) 
Seb 
= 
March l...' 0O 
i= 
= ep 
wa 
ae 
= op 
= 
Positive Leak. 
| 
Current. 
| es 
4(=3~x 10-8) 
| 2 
! 
: 0 
14 (=1:05 x 10-7) 
Wark 
66 (=4:9x 10-7) 
52 
32 
15 
251 (=1'8x 10-6) 
181 
Volts on | Current. Volts on | 
Filament. 1=7°5x10—9 amp. | Filament. 1=7-5 x 10—9amp. 
0 13 +800 
— 290 158 +600 
—410 198 +400 
—575 Zlotv=1"5 K10=6) 
) 200 + 80 
— 40 600 +600 
— 80 1,250 +200 
ei) L7o0 
—200 2,390 
— 320 3,000 
--600 '4,100(=3:07 x 10-5) 
0 800 + 600 
— 80 5,800 +400 
—160 11,050 +200 
—240 15,500 + 80 
— 400 24,000 
—600  (29,500(=2-2 x 10-4) 
+ 40 155 
O 2,000 +800 
— 80 16,000 +600 
—160 39,000 +400 
—280 72,500 +200 
—400 99,000 + 80 
— 600 127,500 
— 800 f 210,000 
t(=15x 10-3) 
+ 40 339 
0) 2,000 +600 
— 80 | 15,500 +400 
—195 46,500 +200 
—275 66,000 +120 
— 390 85,000 + 80 
—505 100,000 
—580 112,500 
—710 | 132,500 
—790 150.000 
