800 



PROCEEDINGS OP THE AMERICAN ACADEMY. 



TABLE III. 



The plot of the corresponding value of n as abscissae and values of 

 column 3 as ordinates gives a curve of corrections for the above coil. 

 For example, at a frequency of 50,000 there is 0.7 of the total possible 

 change (equal to L 2/3 d/r x X 1.25 approximately) still to go. Or, the 



