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Description: Davis later C19 magneto-electric therapy machine with mechanism to show magnet keepers position on exterior dial, probably English-made, 1860-1890 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: electrotherapy equipment Temporal: 1860-1890 Source: Science Museum Identifier: A630967 Go to resource More Like this...
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