Abstracts of Bell System Technical Papers 

 Not Published in This Journal 



Universal Equalizer Chart. D. A. Alsberg\ Electronics, 24, pp. 132, 

 134, Nov., 1951. 



Modification of famiUur Siuith chart consolidates on one time-saving j^lot all 

 positive-value solutions to the two general equations for series, shunt, 

 and hridged-T audio o(|ualizers. 



Limits on the Energy of the Antif err o magnetic Ground State. P. W. 

 Anderson'. Phys. Rev., 83. p. 1260, Sept. 15, 1951. 



Post-War Achievements of Bell Laboratories, I. O. E. Buckley . Bell 

 Tel. Mag., 30, pp. 1G3-173, Autumn, 1951. 



Filamentary Growths on Metal Surfaces — ^'Whiskers". K. G. Compton\ 

 A. Mendizza\ and S. M. Arnold\ Corrosion, 7, pp. 327-334, Oct., 

 1951. (Monograph 1885). 



Filamentary growths have been found on metal surfaces of some of the parts 

 used in telephone communications equipment, particularly on parts shielded 

 from free circulation of air. The growths are of the same character as those known 

 as "whiskers," which developed between the leaves of cadmium plated variable 

 air condensers and caused considerable trouble in military equipment during the 

 carl}- i)art of World War II. An investigation has been under way in an attempt 

 to determine the mechanism of growth of the whiskers, found not only on 

 cadmium plated parts but also on other metals. This paper summarizes the 

 findings to date as revealed by the study of approximately one thousand test 

 specimens of different metals, solid and plated, exposed under various environ- 

 mental conditions. The study is being extended in the light of the findings which 

 have developed during the course of the work. 



An Unattended Broad-Band Microwave Repeater for the TD-2 Radio 

 Relay System. R. W. Friis' and K. D. Smith\ Elec. Eng., 70, pp. 976- 

 981, Nov., 1951. (Similar article in The Bell System Technical Journal, 



* Certain of these papers are available as Bell System Monographs and may be 

 obtained on reciuest to the Publacation Department, Bell Telephone Laboratories, 

 Inc., 463 West Street, New York 14, N. Y. For papers availaljlc in this form, the 

 monograph number is given in parentheses following the date of publication, and 

 this number should be given in all requests. 



'B. T. L. 



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