HE BELL SYSTEM 



nicai lournal 



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VOTED TO THE SCIENTIFIC ^W^ AND ENGINEERING 

 PECTS OF ELECTRICAL COMMUNICATION 



LUME XXXVI MARCH 1957 ^«*i^'5> NUMBER 2 



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A New Carrier System for Rural Service APK «5 136/ 



B. C. BOYD, J. D. HOWARD, AND L. PEDERSEN 349 



An Experimental Dual Polarization Antenna Feed for Three Radio 



Relay Bands R. w. dawson 391 



The Character of Waveguide Modes in Gyromagnetic Media 



H. SEIDEL 409 



Measurement of Dielectric and Magnetic Properties of Ferro- 

 magnetic Materials at Microwave Frequencies 



WILHELM VON AULOCK AND JOHN H. ROWEN 427 



Sensitivity Considerations in Microwave Paramagnetic Resonance 

 Absorption Techniques g. feher 449 



The Determination of Pressure Coefficients of Capacitance for 

 Certain Geometries d. w. mccall 485 



Reading Rates and the Information Rate of a Human Channel 



J. R. PIERCE AND J. E. KARLIN 497 



Binary Block Coding s. p. lloyd 517 



Selecting the Best One of Several Binomial Populations 



AflLTON SOBEL AND MARILYN J. HUYETT 537 



Bell System Technical Papers Not Published in This Journal 577 



Recent Bell System Monographs 583 



Contributors to This Issue 588 



COPYRIGHT 1957 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



