IMPARTED TO A VACUUM BV HOT CONDUCTORS. 
Pressure in millims. 
of mercurj^. 
Resistance of wire 
in ohms. 
Saturation current, 
1 = ampere x 10~”. 
Temperature in ° C. 
•024 
9-725 
9-718 
1-04 
1194 
j -044 
1 
10-16 
10-14 
13-62 
1298 
•091 
10-63 
10-61 
116 
1419 
•106 
10-79 
10-75 
578 
1449 
•152 
10-95 
10-91 
1370 
1490 
•180 
11-13 
11 -07 
1730 
1533 
•162 
11-35 
11•355 
4180 
1599 
The 1 elation l^etween the saturation cuiTent and the temperature is shown 
giajDhically in fig. 4. Tlie ordinates give the value of the saturation current, the 
3^u 2 
