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Scientific American, Vol. 51, No. 2 (1884) (1884)

leaf 15

An illustration from Scientific American, Vol. 51, No. 2 (1884), 1884, leaf 15
A ye CaN .ne unless so stamped. § Send for Price List ‘‘ B.” : eOEN NN PR oA rs) so per line, by measurement, as the letter press, Adver- “OCA Ky TRADE MARK 7+) Re oe 2 . ° ° tigemente ranust be received at publication office as early : hii gone Phan: g oS JENKINS BROS,, Mechanical Engineering, y g… … owned by this company, covers every form of apparatus, including Microphones or Carbon Telephones, in which Le ee 7 7 SHELLAC. the voice of the speaker causes electric undulations corresponding to the words spoken, and which articula- tions produce similar articulate sounds at the receiver.…

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