Abstracts of Bell System Technical Papers* 

 Not Published in This Journal 



Mechanical Properties of Discrete Polymer Molecules. W. 0. Baker\ 

 W. P. Mason^ and J. H. Heiss\ J. Polymer Sci, 8, pp. 129-155, Feb., 

 1952. (Monograph 1937). 



Post-War Achievements of Bell Laboratories: II. O. E. Buckley\ 

 Bell Tel. Mag., 30, No. 4, pp. 224-237, 1951-1952 



A Portable, Direct-Reading Microwave Noise Generator. E. L. Chin- 

 nock . Proc. Inst. Radio Engrs., 40, pp. 160-164, Feb., 1952. (Mono- 

 graph 1939). 



This paper discusses the factors which influenced the design of a directly 

 calibrated portable microwave noise source, utilizing a fluorescent lamp. The 

 variation of the noise power output and the impedance match as a function of 

 the operating temperature are considered, and the portable unit is described. 



The Quantum Theory. K. K. Darrow\ Sci. Am., 186, pp. 47-54, 

 Mar., 1952. (Monograph 1940). 



Concerning the early years of this fundamental concept of modern physics — 

 how Max Planck formulated it at the turn of the century and how others en- 

 larged it up to 1923. 



Performance of Ultrasonic Vitreous Silica Delay Lines. M. D. Fagan\ 

 Tele-Tech, 11, pp. 43-45, 138+, Mar., 1952. (Monograph 1951). 



Results of tests at 10 and 60 mc with resistive terminations of 75 to 1000 

 ohms. Low terminating impedance values yield wide bands but involve higher 

 insertion losses. 



Phase Transition of NDiDiPO^. B. T. Matthias\ Phys. Rev., v. 85, 

 p. 141, Jan. 1, 1952. 



Engineering Local Television Facilities and Their Operation. B. D. 



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

 be obtained on request to the Publication Department, Bell Telephone Labora- 

 tories, Inc., 463 West Street, New York 14, N. Y. For papers available in this 

 form, the monograph number is given in parentheses following the date of pub- 

 lication, and this number should be given in all requests. 



1 Bell Telephone Laboratories. 



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