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Telephonic speaking and hearing

โœ Scribed by Gfs


Publisher
Elsevier Science
Year
1923
Tongue
English
Weight
125 KB
Volume
195
Category
Article
ISSN
0016-0032

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Edison's carbon telephone transmitter, a
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Plu\*h--Edison's Telephone, etc. [Jour. Frank. Inst., from window spaces and window frames. Scrubbing brushes, vigorously applied, might remove them. Any simple device would serve to divert the dirty drippings which soak the bricks beneath the windows, developing characteristic white patches here b

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New telephonic transmitter
๐Ÿ“‚ Article ๐Ÿ“… 1878 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 54 KB

Trouvg has invented a cylindrical microphone, which resembles a small dark-lantern, with a carbon crayon substituted for the candle. When placed in the middle of a room, it reveals all secrets. It transmits the voice admirably to a receiving telephone, even when the speaker stands 25 metres (82 ft.)