BELL SYSTEM TECHNICAL JOURNAL 



JULY, 1935 



Further Results of a Study of Ultra-Short-Wave Transmission 

 Phenomena — 



C. R. Englund, A. B. Crawford and W. W. Mumford 369 



Acoustical Instruments — E. C. Wente 388 



Thermionic Electron Emission — /. A. Becker 413 



Radio Propagation Over Spherical Earth — Chas. R. Burrows .... 477 

 A Single-Sideband Short- Wave System for Transatlantic Teleph- 

 ony — F. A. Polkinghorn and N. F. Schlaack 489 



Mutual Impedances of Parallel Wires — 



Ray S. Hoyt and Sallie Pero Mead 509 

 An Unattended Ultra-Short-Wave Radio Telephone System — 



N. F. Schlaack and F. A. Polkinghorn 534 

 Around the World by Telephone 542 



October, 1935 



Dr. George A. Campbell — F. B. Jewett 553 



Dr. Campbell's Memoranda of 1907 and 1912 558 



Some Aspects of Low-Frequency Induction Between Power and 



Telephone Circuits — H. R. Huntley and E. J. O'Connell . ... 573 

 Circulating Currents and Singing on Two- Wire Cable Circuits — 



L. G. Abraham 600 

 Operation of Ultra-High-Frequency Vacuum Tubes — 



F. B. Llewellyn 632 

 Further Extensions of Theory of Multi-Electrode Vacuum Tube 



Circuits — S. A. Levin and L. C. Peterson 666 



Transatlantic Long- Wave Transmission — 



Austin Bailey and H. M. Thomson 680 

 Technical Digests — 



1. Superiorities of Lead-Calcium Alloys for Storage Battery 



Construction — H. E. Haring, U. B. Thomas, E. E. 

 Schumacher and G. S. Phipps 699 



2. Marine Radio Telephone Service for Boston Harbor — 



F. A. Gifford and R. B. Meader 702 



3. Harbor Craft Ship-to-Shore Radio Telephone Service in 



Puget Sound Area — E. B. Hansen 708 



4. Ship Sets for Harbor Ship-to-Shore Service — 



H. N. Willets 713 



5. An Electromechanical Representation of a Piezoelectric 



Crystal— T^. P. Mason 718 



