HE BEL L S Y S T E M 



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VOTED TO THE SCIENTIFIC ^^r>^ AND ENGINEERING 

 PECTS OF ELECTRICAL COMMUNICATION 



LUME XXXII JANUARY 1953 ,?NfUMBER 1 



Surface Properties of Germanium 



WALTEB H. BRATTAESr AND JOHN BARDEEN 1 



Frequency Economy in Mobile Radio Bands 



KENNETH BULLINGTON 42 



Intermodulation Interference in Radio Systems 



WALLACE C. BABCOCK 63 



Magnetic Resonance: Part I— Nuclear Magnetic Resonance 



KARL K. DARROW 74 



Delay Curves for Calls Served at Random John riordan 100 



The Evaluation of Wood Preservatives — Part I 



REGINALD H. COLLEY 120 



Motion of Gaseous Ions in Strong Electric Fields 



GREGORY H. WANNIER 170 



Abstracts of Bell System Papers Not Published in this Journal ^55 

 Contributors to this Issue ^^^ 



COPYRIGHT 1953 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



