300 BELL SYSTEM TECHNICAL JOURNAL 



3. K. B. McEachron: "Lightning to the Emjjire State Building," Electrical Engineering, 



Dec. 1938 and Sept. 1941. 



4. W. W. Lewis and C. M. Foust: "Lightning Investigations on Transmission Lines" 



Wlll—A.LE.E. Trans., Vol. 64, 1945, p. 107. 



5. H. Grunewald: C.I.G.R.E. 1939, Report 323. 



6 C. F. Wagner and G. D. McCann: "Lightning Phenomena," Elec. Engg., Aug., Sept. 

 and Oct. 1941. 



7. C. E. R. Bruce and R. Golde: "The Mechanism of the Lightning Stroke and its Effect 



on Transmission Lines," Jour. I.E.E., Part II, Dec. 1941. 



8. E. D. Sunde: "Surge Characteristics of a Buried Bare Wire," A.LE.E. Transactions, 



Vol. 59, 1940 or Bell Telephone System Monograph B-1279. 



9. S. A. Schelkunoff: "Electromagnetic Theory of Coaxial Transmission Lines and 



Cylindrical Shield," Bell System Technical Journal, October, 1934. Equation (5) 

 is equivalent to Equation (82) of the above paper. 



10. G. A. Campbell and R. M. Foster: "Fourier Integrals for Practical Applications," 



Bell Telephone System Monograph B-584, pair 807. 



11. E. D. Sunde: "Currents and Potentials Along Leaky Ground Return Conductors," 



Elec. Engg., December 1936 or B.T.S. Monograph B-970. 



12. J. R. Carson: "Wave Propagation in Overhead Wires with Ground Return," Bell Sys. 



Tech. Jour., October 1926. Z obtained by use of (34) and (35) and M by use of (36) 

 and (37) of the paper referred to. 



13. J. Riordan and E. D. Sunde: "Mutual Impedance of Grounded Wires for Stratified 



Two-Layer Earth," Bell Svsteni Technical Journal, April 1933 or B.T.S. Monograph 

 B-726. 



14. E. Hansson and S. K. Waldorf: "An Eight- Year Investigation of Lightning Currents 



and Preventive Lightning Protection on a Transmission System" presented at 

 A.LE.E. 1944 Winter Convention. 



15. W. H. x\lexander: "The Distribution of Thunderstorms in the United State?, 1934- 



33," Monthly Weather Revieic, Vol. 63, 1935, page 157. 

 16 A. Matthias: "Modellversuche uber Blitzeinschlage," E.T.Z. Aug. 12 and Sept. 9, 



1937. 

 17. A. Matthias and W. Burkhardtsmaicr: "Der Schutzraum von Blitzfang-Vorrichtungen 



und seine Ermittlung durch Modellversuche," E.T.Z. , June 8 and June 15, 1939. 

 18 C F. Wagner, G. D. McCann and G. L. MacLane, Jr.: "Shielding of Transmission 



Lines", A.LE.E. Trans., Vol. 60, 1941, p. 313-328. 



19. C. F. Wagner, G. D. McCann and C. M. Lear: "Shielding of Substations," A.LE.E. 



Trans., Vol. 61, 1942, p. 196-200. 



20. P. L. Bellaschi, R. E. Armington and A. E. Snowden: "Impulse and 60-cycle Char- 



acteristics of Driven Grounds— -11," A.LE.E. Trans., Vol. 61, 1942, p. 349. 



21 R. Davis and T. E. M. Johnston: "Surge Characteristics of Tower Footing Imped- 

 ance," J.LE.E. Vol. 88, Part II, No. 5, Oct. 1941. 



22. I. R. Eaton: "Impulse Characteristics of Electrical Connections to the Earth," General 

 Electric Review, Oct. 1944, p. 41-50. 



23 G D. McCann: "The Effect of Corona on Coupling Factors between Ground Wires 

 and Phase Conductors," A.LE.E. Trans., Vol. 62, 1943, p. 818-826. 



24. G. Wascheck: "Earth Resistivity Measurements," Bell Telephone Laboratories Record, 

 Vol. 19, No. 6, Feb. 1941. 



