3479336 Homacoustic speaking tube, 1892; (add.info.: The homacoustic speaking tube. This model had both mouthpiece and earpiece which made it unnecessary to change position when speaking or listening to someone elsewhere in the building. Dated 1892.); Universal History Archive/UIG; out of copyright.
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Details
Creative#:
TOP27536332
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
Same folder images:
19thcentury19centuryXIXcenturyXIXthcenturycommunicationcommunicationselectricityelectricelectricitemodelelectricaltelephoneearpiecehomacoustic1890selectricmodelmouthpieceelectrical19thcenturyhomacousticelectricityspeakingtubetelephonecommunicationearpieceelectricmodelmouthpieceelectrical19thcenturyhomacousticelectricityspeakingtubetelephonecommunicationearpiece
1890s1919th19th19thXIXXIXthcenturycenturycenturycenturycenturycenturycommunicationcommunicationcommunicationcommunicationsearpieceearpieceearpieceelectricelectricelectricelectricalelectricalelectricalelectriciteelectricityelectricityelectricityhomacoustichomacoustichomacousticmodelmodelmodelmouthpiecemouthpiecespeakingspeakingtelephonetelephonetelephonetubetube
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