56 TRANSMISSION LINE FORMULAS 



For other initial temperatures and other conductivities, 

 temperature coefficients should be used as given in the 

 table of temperature coefficients in Part III, which is 

 taken from Appendix E of the Standardization Rules of the 

 A. I. E. E. 



For the temperature coefficient of hard drawn aluminum, 

 a value of 



0:20 = 0.0039, 



which is recommended by the Bureau of Standards, may 

 be used. 



