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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
- Created on
- Wednesday 19 August 2009
- Posted on
- Wednesday 19 August 2009
- Tags
- communication, image, telephone
- Visits
- 1719