| 
| 
Electricity from a Nernst Filament. 
241 
The scale of the diagram only allows currents below 1600 
divisions to be plotted. 
A similar set of observations was made on March 14 with 
a new filament (II.) at a considerably higher temperature 
(1605° C.). 
and are shown in diagrams 4 and 5. 
TaBLeE LV. 
Filament II. March 14th. Temperatu 
Pressure, 
mms. of 
mereury. 
756 
90 
| Potential on 
filament. |1=7-5x10—9%amp.| 
0 2 (positive) 
— 80 11 (negative) 
—160 16 = 
—240 22 pa 
— 320 23 3 
—400 26 7 
0 14 (positive) 
— 80 46 (negative) 
—160 ae 4 
—240 79 : 
— 320 96 S 
—400 131 5 | 
0 2 (positive) 
— 80 140 (negative) 
—160 193 
— 240 246 
— 320 304 
—400 498 
0 121 
— 80 473 
— 160 715 
— 240 990 
—320 1665 
— 360 2365 
0 250 
— 80 800 
—160 1300 
— 240 2500 
—320 6000 
— 360 10250 
0 550 
— 80 1900 
—160 4500 
— 240 13250 
— 280 48000 
0 3000 
— 80 25000 
—160 60000 
—200 80000 
— 240 102500 
Current 
| 
} 
| 
| 
| 
| 
| 
Pressure, 
mms. of 
mercury. 
27 
1:2 
0°42 
0-14 
0:06 
0°032 
Potential on 
filament. 
0 
— 8&0 
—160 
— 200 
— 240 
Phil. Mag. 8. 6. Vol. 8. No. 44. Aug. 1904. 
The results of this set are given in Table IV. 
re of filament 1605° C. 
Current 
1=7°5 x 10—%amp.| 
_ 50900 (negative) | 
_ 80000 | 
_ 57500 
77500 
107500 
5000 
| 17500 
_ 27500 
32500 
5000 
23500 
45000 
67500 
aes 
S 
—_ 
Or 
~J 
Or 
=) 
| 
