Identifier: bellvol25telephonemag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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used in the demonstration wires. Such protection is even moreimportant for the Bell Systems newcoaxial cable network, which is nowbeing installed throughout the coun-try. Without it, the concentration ofso many important circuits under onecable sheath would be hazardous. As IS USUALLY the case in regard totelephone facilities, the most exhaus-tive sort of test cannot write the lastchapter to gas pressure technique.For example, the introduction of anew type of cable—the buried cable —resulted in a need for more ac-curate leak locations. The varioustypes of sheath protection with whichthese buried cables are covered maycause gas to flow under the coveringfor a considerable distance from theactual break in the sheath before it isreleased. However, refinements inmethods and equipment for locatinga sheath break have been developed,and specialists in gas pressure feelthat whatever problems may becreated by new designs of cable, theywill be able to solve them. 174 Bell Telephone Magazine
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Thoroughgoing Preparations Permitted Changing All of a Great City s Telephone Numbers with a Maximum of Public Cooperation and a Minimum of Difficulty Philadelphia Goes 2-5 )^ Harold S. LeDuc From the days of vaudeville—andprobably long before that—Philadel-phia has been joked about, satirized,and maligned as a city where anychange is regarded as painful, anydeviation from things as they havealways been carefully shunned.Philadelphians, the old saying goes,are taller and fairer than Chinese,but not quite so progressive. But recently a change was acceptedby Philadelphians—with great goodnature—that makes these allegationsseem an undeserved and libelous labelon a great and growing city. Literally overnight a change tookplace in Philadelphia which called forthe cooperation of all telephone users.It was a change which at first glancemight seem trivial—but which ac-tually was far-reaching in both its Im-mediate and Its ultimate effects on thecitys telephone service. Since Philade

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