Vol.5 No.1  (1921/01)    
Cover
  
表紙
The Institute of Teregraph and Telephone Engineers of Japan 
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minutes
pp.1-4  
事務報告
The Institute of Teregraph and Telephone Engineers of Japan 
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Speech
pp.5-8    Open Access
会長就任演説
稲田三之助 
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pp.9-32  
電線のエナメル鍍に就て
湊屋祝三郎 
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pp.33-40  
The Development of Telephony in the United States
J．L．Mc．Quarrie 
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pp.41-83  
電話交換サーヴィスと負荷との関係　上
中田未広 
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Contribution
pp.73-74  
Commercial Development of the Connection of Wired and Wireless Telephony，and Wired Wireless in Japan．
E．Yokoyama 
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Miscellaneous notes
pp.75-78  
大正九年中に於ける電信電話界
The Institute of Teregraph and Telephone Engineers of Japan 
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Online ISSN:2188-2355