Der sprechende Flammenbogen und die Telephonie ohne Draht vermittelst Lichtstrahlen
From the series
Source information
Type | Miscellaneous
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Author | |
Year of Publication |
1897
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Featured Topics
Telephony
Instruments and Technologies
Microphone
Telephone
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Original from
Smithsonian Libraries
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In public domain
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Smithsonian Libraries, http://www.sil.si.edu/DigitalCollections/trade-literature/scientific-instruments/files/51664/
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