Technical Publications by Bell System Authors Other Than 

 in the Bell System Technical Journal 



Progress in Coaxial Telephone and Television Systems* L. G. Abraham.^ 

 A.I.E.E., Trans., V. 67, pt. 2, pp. 1520-1527, 1948. 



Abstract — This paper describes coaxial systems used in the Bell System 

 to transmit telephone and television signals. Development of this system 

 was started some time ago, with systems working before the war between 

 New York and Philadelphia and later between Minneapolis, Minnesota and 

 Stevens Point, Wisconsin. Various stages in the progress of this develop- 

 ment have been described in previous papers and the telephone terminal 

 equipment has been recently described. This paper will outline how the 

 system works and discuss some transmission problems, leaving a complete 

 technical description for a number of later papers. 



Use of the Relay Digital Computer. E. G. Andrews and H. W. Bode.^ 

 Elec. Engg., V. 69, pp. 158-163, Feb., 1950. 



Abstract — This paper is concerned primarily with the operating features 

 of the computer and its application to problems of scientific and engineer- 

 ing interest. The material herein has been derived largely from the experi- 

 ence gained with one of the computers during a trial period of about 5 

 months before final delivery. An effort was made during that time to try the 

 machine out on a variety of difficult computing problems of varying char- 

 acter to obtain experience in its operation and to establish as well as pos- 

 sible what its range of usefulness might be. 



Longitudinal Noise in Audio Circuits. H. W. Augustadt and W. F. Kan- 

 NENBERG.i Audio Engg., V. 34, pp. 18-19, Feb., 1950. 



Abstract — The words "longitudinal interference" have often been used 

 to explain the origin of unknown noise in audio circuits with little actual 

 regard to the source of the interference. In this respect, the usage of these 

 words is similar to the popular usage of the word "gremlins". We attribute 

 to gremlins troubles whose causes are unknown without much attempt to 

 delve deeper into the matter. Similarly in the audio facilities field, many 

 noise troubles are attributed to "longitudinal interference" or "longitudi- 

 nals" or even simply "line noise" without a clear understanding of the na- 

 ture of the trouble or the actual meaning of the terms. The noise trouble, 

 however, still persists irrespective of the name applied to it until its causes 

 are thoroughly understood and the correct remedial action is applied. This 



*A reprint of this article mav be obtained on request to the editor of the B.S.T.J. 

 ip.T.L. 



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