March, H)1S| 



A Lecher System— Theoretical 



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of 7/ where Ko/ k is perceptibly constant, at least so long as the 

 forms of d{ij) and 0(7/) remain unknown. 



Now in the work of Blake and Jackson the per cents of error 

 were least for // = 8, as column 25 of their Table I shows as also 

 does their Figure 7. We have carried through the calculation of 

 E for the following values of jj: 7.15, 8.0, 9.0, 11.1 cm., and 

 have collected the results into Table I. 



Table I. 



