Diy Heliograph
A simple heliograph is easily constructed, and uses the sun's rays to transmit messages, in morse code, over distances up to 100 kilometres
Picture No
10193590
Media ID
47404928
Size
4593px x 2942px
(2.0MB)
Credit
Mary Evans Picture Library
Source
Liebig card in series 1116 Curieuses experiences de physique' issued in 1921 4 of 6
Date
1921
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Constructed Distances Easily Experiments Heliograph Kilometres Messages Morse Rays Transmit
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