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U M E XXXV JANUARY 1956 tf k k--- • ' t. N U M B E R-lv 



DiflPused Emitter and Base Silicon Transistors J ^' ^ '^ ^ ^^^° 



M. TANENBAUM AND D. E. THOMAS 1 



A High-Frequency Diffused Base Germanium Transistor c. a. lee 23 



Waveguide Investigations with Millimicrosecond Pulses 



a. c. beck 35 



Experiments on the Regeneration of Binary Microwave Pulses 



o. B. delange 67 



Crossbar Tandem as a Long Distance Switching System 



a. O. ADAM 91 



Growing Waves Due to Transverse Velocities 



J. R. pierce and l. r. walker 109 



Coupled Helices j. s. cook, r. kompfner and c. f. quatb 127 



Statistical Techniques for Reducing the Experiment Time in Re- 

 liability Studies MILTON sobel 179 



A Class of Binary Signaling Alphabets david slepian 203 



Bell System Technical Papers Not Published in This Journal 235 



Recent Bell System Monographs 242 



Contributors to This Issue 244 



COPYRIGHT 1956 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



