ScientificAmerican1881-01-01.jpg Film Fun 1932-04 CanadianThumbnailsScientific American 1881-06-18Film Fun 1932-04 CanadianThumbnailsScientific American 1881-06-18Film Fun 1932-04 CanadianThumbnailsScientific American 1881-06-18Film Fun 1932-04 CanadianThumbnailsScientific American 1881-06-18Film Fun 1932-04 CanadianThumbnailsScientific American 1881-06-18
Bell's photophone. The articulating photophone -- the transmitter; the selenium receiver.



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

Restoration by: magscanner