380 BELL SYSTEM TECHNICAL JOURNAL 



Undoubtedly, further improvements in station transmission per- 

 formance will, as in the past, be forthcoming with advances in the 

 technique of design and manufacture, and in further knowledge of the 

 requirements of the problem. 



References 



1. "Instruments for the New Telephone Sets," W. C. Jones, this issue of the Bell 



System Technical Journal. 



2. "Rating the Transmission Performance of Telephone Circuits," W. H. Martin, 



Bell System Technical Journal, Vol. X, January 1931, pp. 116-131. 



3. "Scientific Research Applied to the Telephone Transmitter and Receiver," 



E. H. Colpitts, Bell System Technical Journal, Vol. XVI, July 1937, pp. 251- 

 274. 



4. "Speech Power and Its Measurements," L. J. Sivian, Bell System Technical 



Journal, Vol. VIII, October 1929, pp. 646-661. 



5. "Transmission Circuits for Telephonic Communication," K. S. Johnson, D. Van 



Nostrand Co., New York, 4th Printing, 1929, p. 105. 



6. "Maximum Output Networks for Telephone Substation and Repeater Circuits," 



G. A. Campbell and R. M. Foster, A. L E. E. Transactions, Vol. XXXIX, 

 Pt. 1, pp. 231-280 (1920) (disc, pp. 280-290). 



7. "An Explanation of the Common Battery Anti-sidetone Subscriber Set," C. O. 



Gibbon, Bell System Technical Journal, Vol. XVII, April 1938, pp. 245-257. 



8. "A System of Effective Transmission Data for Rating Telephone Circuits," 



F. W. McKown and J. W. Emling, Bell System Technical Journal, Vol. XII, 

 July 1933, pp. 331-346. 



9. "Trend in Design of Telephone Transmitters and Receivers," W. H. Martin and 



W. F. Davidson, Bell System Technical Journal, Vol. IX, October 1930, pp. 

 622-627. 



10. "Transmitted Frequency Range for Telephone Message Circuits," W. H. Martin, 



Bell System Technical Journal, Vol. IX, July 1930, pp. 483-486. 



11. "Transmitted Frequency Range for Circuits in Broad Band Systems," H. A. 



Affel, Bell System Technical Journal, Vol. XVI, October 1937, pp. 487-492. 



12. "A Voice and Ear for Telephone Measurements," A. H. Inglis, C. H. G. Gray 



and R. T. Jenkins, Bell System Technical Journal, Vol. XI, April 1932, pp. 

 293-317. 



13. "Development of a Handset for Telephone Stations," W. C. Jones and A. H. 



Inglis, Bell System Technical Journal, Vol. XI, April 1932, pp. 245-263. 



