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Title: Home made coherer (made by donor, Peter Helsdon), made from [Go to resource]
Description: Home made coherer (made by donor, Peter Helsdon), made from Marconi data. Zinc granules, brass electrodes (1935) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1990-476 Go to resource More Like this...
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