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Détails de la page de couverture
The Telephotographic Apparatus of Rignoux and Reproductions Showing How the Letters of a Message Appear in the Receiver
Transmitting stations
a. magnetic relays
b. bank of 64 selenium cells
The receiving apparatus :
c. : translucent screen on which the images from the revolving mirror d are received
Receiving station
e. : solenoïd
f. : nicol prism
g. : arc light
The letter U in the Rignoux receiving mirror
Tle letter L in the Rignoux receiving mirror
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