History of Science Museum: Collection Database Search

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Inv. Num. 29475 - Marconi coherer

A sensitive detector of radio waves consisting of an evacuated thin glass tube with metal filings in the gap formed by two metal plugs; the whole supported by an ivory rod. This is an improved version for commercial use of the coherer introduced in 1890. It could only be used for picking up the dots and dashes of morse code.

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