1186 thp: bell system technical journal, September 1954 



RADIUS 



0.3 



Q 0.2 



0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 I 6.0 



RADIUS ^O 



Y\^. 9(n), toj), and (o), bottom — See Fig. 9. 



