see Figure 10. The freauency response of a coated wire falls off with increasing frequency 
but the curve is always higher than the corresponding frequency response curve for the 
constant-current wire, see Figure 11. 
As the step response of a constant-temperature coated wire is quite different from a 
simple exponential function the simple differentiating circuit used to compensate a constant- 
current wire would be wholly inadequate. From the data given here it would be possible to 
design a suitable circuit but it might be difficult to determine a method of setting the circuit 
elements for different operating conditions. 
ACKNOWLEDGMENTS 
The author is indebted to Mr. R.D. Cooper and Dr. W.L. Haberman for their helpful dis- 
cussions and suggestions during the preparation of this work and for their comprehensive re- 
view of the report. Mr. C.O. Walton assisted with the computations. 
TABLE 1 
Values of the Functions Cp 9(#,y), Coy (#,Y), ®Cy o(# ¥), and £C,,(z,y) 
for a/b = 1.5 
[> [es [ean rn a 
0.254262 0.671056 | —0.611646 | 0.156798 
0.247477 0.364740 | —0.568144 | 0.254431 
0.237502 0.221317 | —0.505004 0.342003 
0.224575 0.133442 | —0.424674 0.416057 
0.209002 0.072114 | —0.330257 0.473669 
0.191148 0.026366 | —0.225410 | 0.512567 
0.171430 | —0.008802 | —0.114168 | 0.531225 
0.150300 | —0.035969 | -0.000823 | 0.528921 
0.128237 | —0.056625 | +0.110280 | 0.506769 
0.105732 | -0.071713 0.240180 | 0.462697 
0.083273 | —0.081907 
0.061337 | —0.087747 
0.040369 | —0.089715 
0.020781 | -0.088271 
—0.05524 +0.001514 
— 0.05387 0.006835 
—0.05202 0.01188 
0.04974 0.01660 
—0.04706 0.02098 
— 0.04403 0.02499 
—0.04067 0.02861 
— 0.03705 0.03182 
— 0.03319 0.03460 
37 
