. The Bell System technical journal . Fig. 6 IS B I ^^m^ 1 t02)■2S IV I—nm^ 1 I A ^W3 «M K5>K5>HH c E,= E2. ■KK^K^D^ E| =E2 Fig. 7 A I ^W5^ l(2)MS I ■-ly^K^^ 1 »^ (2) I OKJ^ \ ^W3 M MA B l(2)l2A l(2)^3A -^ s H \ ^XS ^M - -^ s Fig. 8 l(|^=llI^--l|^ = I^^\ \ A N. B A \ B I OJM^ + - Ms -^PP 1 2S ^E| W=^ ^M

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1