44 BELL SYSTEM TECHNICAL JOURNAL 



. e-'*'^[/t, , .^/^ , 1 \ , 2(1 + T^ll - THkw) 



+ 



(iyfera)^ 



2 - 6/t2 - (6 - Sr'^ + ST*)ikwlTyl\ - r^ - 2{ikwY 



If klazjri -C 1 the leading terms give 



g-ikn 2(1 + tVI - T^iM 



Ed = — ioi 



^2 ikr^T^l 



_ _ . e-^*^2 2(1 + tVI - T'^^y^2)(l + tVi - r^'iy^a) 



and EJEz is the same as obtained above with a = 0. 



Bibliography 



1. J. Zenneck: Ann. der Physik, Bd. 23, page 846, 1907. 



2. A. Sommerfeld: Ann. der Physik, Bd. 28, page 705, 1909. Jahrb. d. drahtl. Tel, 



Bd. 4, page 157, 1911. 



3. W. H. Wise: Proc. I. R. E., Vol. 19, page 1684, 1931. 



4. W. H. Wise: Bulletin Amer. Math. Soc, Vol. XLI, pp. 700-706, October, 1935. 



5. Bruno Rolf: Ingeniors Vetenskaps Akademien, Handlingar, Nr 96, 1929. 



6. Balth. van der Pol: Zeitschrift fiir Hochfrequenztechnik, Bd. 37, page 152, 1931. 



7. H. Weyl: Ann. der Physik, Bd. 60, page 481, 1919. 



8. W. H. Wise: Physics, Vol. 4, page 354, 1933. 



9. K. A. Norton: Proc. I. R. E., Vol. 24, page 1367, 1936. 



10. C. R. Burrows, Nature, Aug. 15, 1936. A more complete description will appear 

 in the February issue of the Proc. I. R. E. 



