CARRIER SYSTEMS ON TELEPHONE LINES 629 



W. H. Martin. Transmission Unit and Telephone Transmission Reference Systems. Bell System 

 Tech. Jl., V. 3, July 1924, pp. 400-408, and A. I. E. E. JL, V. 43, No. 6, June 1924, pp. 504-507. 



Louis Cohen. Radio Sur Lignes. L'Onde Elect., V. 3, No. 34, October 1924, pp. 477-490. 



N. H. Slaughter. Carrier Telephone Equipment for High-Voltage Power Transmission Lines. 

 Electrical Communication, V. 3, No. 2, October 1924, pp. 127-133. 



W. H. Harden. Practices in Telephone Transmission Maintenance Work. Bell System Tech. JL, 

 V. 4, No. 1, January 1925, pp. 26-51. 



W. V. Wolfe. Carrier Telephony on High-Voltage Power Lines. Bell System Tech. JL, V. 4, No. 1, 

 January 1925, pp. 152-177. 



B. P. Hamilton, H. Nyquist, M. B. Long and W. A. Phelps. Voice Frequency Carrier Telegraph 

 System for Cables. A. I. E. E. JL, V. 44, No. 3, March 1925, pp. 327-332, and Electrical Com- 

 munication, V. 3, No. 4, April 1925, pp. 288-294. 



J. J. Jakosky and D. H. Zellers. Line Radio and the Effects of Metallic Conductors on Under- 

 ground Communication. Reports of Investigations, Department of the Interior- — Bureau of 

 Mines, Serial No. 2682, April 1925. 



R. A. Heising. Production of Single Sideband for Transatlantic Radio Telephony. /. R. E. Pro- 

 ceedings, V. 13, No. 3, June 1925, pp. 291-312. 



W. H. Capen. Wire Telephone Communication in Theory and Practice. Electrical Communication, 

 V. 4. January 1926, pp. 161-183. 



Thomas Shaw and William Fondiller. Development and Application of Loading for Telephone 

 Circuits. Bell System Tech. JL, April 1926, pp. 221-281, and A. I. E. E. JL, V. 45, No. 3, 

 March 1926, pp. 253-263. 



B. R. CuMMiNGS. Carrier Current Communication. General Electric Review, V. 24, May 1926, 

 pp. 365-367. 



H. W. Hitchcock. Carrier Current Communication on Submarine Cables. A. I. E. E. JL, V. 46, 

 No. 10, October 1926, pp. 923-929, and Bell System Tech. JL, V. 5, October 1926, pp. 636-651. 



F. C. Willis and L. E. Melhuish. Load Carrying Capacity of Amplifiers. Bell System Tech. JL, 



V. 5. October 1926, pp. 573-592. 



H. a. Affel and J. T. O'Leary. High-Frequency Measurements of Communication Lines. A. I. 

 E. E. Transactions, V. 44, 1927, pp. 504-513. 



E. I. Green. Methods of Measuring the Insulation of Telephone Lines at High Frequencies. A. I. 

 E. E. Transactions, V. 44, 1927, pp. 514-518. 



W. J. Shackelton and J. G. Ferguson. High Frequency Measurements of Communication Appa- 

 ratus. A. I. E. E. Transactions, V. 44, 1927, pp. 519. 



W. J. Shackelton. Shielding Bridge for Inductive Impedance Measurements at Speech and Carrier 

 Frequencies. A. I. E. E. JL, V. 44, No. 2, February 1927, pp. 159-166. 



G. E. Stewart and C. F. Whitney. Carrier Current Selector Supervisory Equipment. A. I. E. E. 



JL, V. 44, No. 6, June 1927, pp. 588-592. 



G. A. BODDIE. Telephone Communication over Power Lines by High-Frequency Currents. Pro- 

 ceedings of I. R. E., V. 15, July 1927, pp. 559-640. 



G. A. BODDIE. Use of High-Frequency Currents for Control. A. I. E. E. JL, V. 44, No. 8, August 

 1927, pp. 763-769. 



