Odd Shout-O-Phone Spans Border (Jun, 1940)
Filed under: Just Weird — @ 1:01 pm
Source: Popular Science ( More articles from this issue )
Issue: Jun, 1940
| Buy on Ebay
Source: Popular Science ( More articles from this issue )
Issue: Jun, 1940
| Buy on Ebay
Odd Shout-O-Phone Spans Border
FRIENDS and relatives on opposite sides of the French-Swiss border must exchange greetings across a forbidden zone seventy feet wide, but that doesn’t matter to the well-equipped conversationalist shown at the left. He talks through a megaphone, and listens with ear trumpets like airplane detectors, while his binoculars complete the illusion of nearness.
[...] The Shout-O-Phone [link] [...]
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