. The Bell System technical journal . 1 30AM 4;00AM 900PM 700PM 8 30 PM J^ / ^-^ «^, A A r\ A * /\ A A /\ r \A aAv ^r\Y^r ..y^ f V SEPT. 2 0,1934 930PM 1030PM irOOPM t^ V\ 1— \ XV/> r^ \v ~\./) A r -c .-.{ v^ \ f V vv w^ 1 ^z pvv 1 W SEPT 21,1 1934 I2;30AM /^Aa^A-.

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1