36 
PROF. 0. W. RICHARDSON ON THE EMISSION OF ELECTRONS 
be found useful. These values happened to be computed for T = 1500 in connection 
with another matter. However, since all the functions are homogeneous in Y/T, they 
can at once be applied to any other temperature T 1 by simply multiplying all the voltages 
by P/1500. Of course, in dealing with the values of d j the appropriate value of the 
factor has to be used. This can readily be ascertained for any values of T and dV 
from the numbers in the second column of the table. 
Table IX. 
V. 
eV 
&T ' 
t>|H 
<WI ^ 
1 
/, , eV\ _eV 
( i+ it) "■ 
eV _«I 
Yf e 
0 
0 
1 
1 
0 
0-05 
0-398 
0-672 
0-268 
0-10 
0-795 
0-452 
0-809 
0-360 
0-20 
1-59 
0-205 
0-528 
0-326 
0-30 
2-385 
0-0926 
0-314 
0-222 
0-40 
3-18 
0-0418 
0-175 
0-133 
0-50 
3-975 
0-0189 
0-0940 
0-0751 
0-60 
4-77 
0-00855 
0-0493 
0-0408 
0-70 
5-565 
0-00386 
0-0253 
0-0214 
0-80 
6-36 
.0-00175 
0-0129 
0-0111 
0-90 
7-155 
0-000787 
0-00642 
0-00563 
1-00 
7-95 
0-000355 
0-00318 
0-00282 
M0 
8-745 
0-000160 
0-00156 
0-00140 
1-20 
9-54 
0-0000730 
0-000768 
0-00070 
1-30 
10-335 
0-0000331 
0-000374 
0-00034 
1-40 
11-13 
0-0000148 
0-000179 
1-50 
11-925 
0-0000068 
0-000088 
eV — 
A set of values of — e _tT is plotted, on an arbitrary scale, in curve III., fig. 17. 
The right-hand part of this shows a close resemblance with the rapidly dropping parts 
