. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 1868 1892 1895 I89S 1896 50 PAIRS 100 PAIRS 122 PAIRS 152 PAIRS 180 PAIRS NO 18 A WCA. N0I9 AWGA NO 19 AWGA N0I9 AWGA N0I9 AWGA N0I9 AWGA. 1901 1901 1902 1912 1914 404 PAIRS 303 PAIRS 606 PAIRS 909 PAIRS 1212 PAIRS 455 PAIRS N0I9 AWGA N022AWGA N022 AWGA N024 A W GA N0I9 AWGA Fig. 5—Principal stages in the development of paper-insulated cable the corresponding decreasing cost per mile of circuit resulting from the changes described is shown in Figs. 5 and 6. 1 i 1 ; 1 ,
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 1868 1892 1895 I89S 1896 50 PAIRS 100 PAIRS 122 PAIRS 152 PAIRS 180 PAIRS NO 18 A WCA. N0I9 AWGA NO 19 AWGA N0I9 AWGA N0I9 AWGA N0I9 AWGA. 1901 1901 1902 1912 1914 404 PAIRS 303 PAIRS 606 PAIRS 909 PAIRS 1212 PAIRS 455 PAIRS N0I9 AWGA N022AWGA N022 AWGA N024 A W GA N0I9 AWGA Fig. 5—Principal stages in the development of paper-insulated cable the corresponding decreasing cost per mile of circuit resulting from the changes described is shown in Figs. 5 and 6. 1 i 1 ; 1 ,... ~" ' ' — — — — — — — — u|l60 3 , NO. 18 GAUGE o*'^° -5n PAIR dli3o ^1120 NOTE:- -]|llO ^|I00 AND LABOR COSTS ARE FIGURED - THE PERIOD OF YEARS SHOWN. ^^^° , r^ r^j ^ ^ " 51 80 .. i 70 122 PAIR' 1 1 1 ^$60 152 PAIR' i-l 180 PAIR: 1 i«60 ^$40 208 PAIR' NO. 19 GAUGE 303 PAIR* 1 1 1 Q-130 1 1 455 PAIRi _ _ ^ ^ 4( M PAIR« )-r N ! r c ) c a r n :> 0 0 a c ) C c c 3 3 r c c y 3 C c 3 > U c ( 3 3 0 3 C c 3 r c i c t 5 9 0 i 0 > c f c 3 c 0 0 r 1 c c 3 OO 0> Fig. 6—Cost of a mile of circuit in full-size cable With the growth of large office buildings and further increases in the demand for telephones in the great cities, even 1,212 pairs of wire per. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
