TELEPHONE SYSTEM OF THE UNITED STATES 



87 



R. W. King 

 O. E. Buckley 



By-Products 



By-Products of Telephone Research. 



Bell Telephone Quarterly, Vol. 7, Oct. 1928, pages 

 304-312. 

 Loaded Submarine Telegraph Cable. 



Bell System Technical Journal, Vol. 4, July 1925, pages 



355-374. 

 Electrical Communication, Vol. 4, July 1925, pages 



60-70. 

 American Institute of Electrical Engineers, Transac- 

 tions, Vol. 44, June 1925, pages 882-890. 

 Telegraph and Telephone Age, Vol. 43, Nov. 16, 1925, 

 pages 524-525. 

 Permalloy Loaded Cable. 



Electrical Communication, Vol. 2, Apr. 1924, pages 



232-234. 



Man-made Ears for the Deaf; Why Many Deaf People Hear 



Normally in Noisy Places and Over the Telephone. 



Scientific American, Vol. 8, Nov. 1925, pages 320-321. 



Recent Advances in Wax Recording. 



Bell System Technical Journal, Vol. 8, Jan. 1929, pages 

 159-172. 

 Sound Recording with the Light Valve. 



Bell System Technical Journal, Vol. 8, Jan. 1929, pages 

 173-183. 

 Synchronization and Speed Control of Synchronized Sound 

 Pictures. 

 Bell System Technical Journal, Vol. 8, Jan. 1929, pages 

 184-195. 

 A Sound Projector System for Use in Motion Picture Theatres. 

 Bell System Technical Journal, Vol. 8, Jan. 1929, pages 

 196-208. 



Miscellaneous 

 Telephone Transmission. 



Sibley Journal of Engineering, Vol. 31, Apr. 1917, pages 

 _ 177-180. 

 Transmission Unit and Telephone Transmission Reference 

 Systems. 

 Bell System Technical Journal, Vol. 3, July 1924, pages 



400-408. 

 American Institute of Electrical Engineers, Transac- 

 tions, Vol. 43, June 1924, pages 797-801. 



Statistics of the Telephone Industry of the United States 



Figure 57. Number of Telephones in the United States. 



Figure 58. Telephone Development in the United States. 



Figure 59. Percentage Distribution of Bell Stations in Fifteen Large Cities in the 

 United States. 



Figure 60. Telephone Conversations — Average Number Daily in Millions in the 

 United States. 



Figure 61. Average Daily Number of Toll Messages in the United States. 



Figure 62. Yearly Telephone Messages per Capital in the United States. 



Figure 63. Kilometers ot Telephone Wire in the United States. 



Figure 64. Kilometers of Exchange and Toll Wire in the United States. 



Figure 65. Telephone Wire in the Bell System. 



Figure 66. Growth of Various Classes of Physical Property in the Bell System. 



Figure 67. Bell System Revenues. 



Figure 68. Table Showing Initial Period Toll Rates. 



Figure 69. Map of the Bell System Showing Territories of the Associated Com- 

 panies. 



Figure 70. Telephone Employees in the United States. 



Figure 71. Table Showing Population and Telephones which may be Connected 

 by Transatlantic Telephone Service. 



F. B. Jewett 

 Harvey Fletcher 

 H. A. Frederick 



D. MacKenzie 

 H. M. Stoller 



E. O. Scriven 



Bancroft Gherardi 

 W. H. Martin 



