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Coherer Receiver, by Guglielmo Marconi, 1896

Marconi used this device for a famous public demonstration of wireless in London's Toynbee Hall in 1896. At a public lecture given by William Preece, chief engineer to the General Post Office, whenever Preece switched a transmitter and created an electric spark, a bell rang on a box Marconi took to any part of the lecture room. There was no visible connection between the two. The demonstration caused a sensation and made Marconi a celebrity.

Inv 86390

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