ScientificAmerican1881-06-18.jpg Scientific American 1881-01-01ThumbnailsScientific American 1902-02-08Scientific American 1881-01-01ThumbnailsScientific American 1902-02-08Scientific American 1881-01-01ThumbnailsScientific American 1902-02-08Scientific American 1881-01-01ThumbnailsScientific American 1902-02-08Scientific American 1881-01-01ThumbnailsScientific American 1902-02-08
Professor A. E. Dolbear's new telephonic system.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner