IRELESS TELEGRAPHY. plate along the line of dots is so set that it must en- At present the negative plate used for the receiving gage" with the rough surface dots. As it comes into BY THE ENGLISH CORRESPONDENT OF THE SCIENTIFIC AMERICAN. apparatus is covered with a film of lampblack, which… … and held fast by a small electro-magnetic brake. It. cone are forced upward and establish contact there- Plan View of Receiver Showing Negative Received. then moves forward a space to the end of the succeed- with, completes the electrical circuit. The impulse Is passed through the coil carried in…
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