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Title: Evershed gravity controlled voltmeter reading 0 to 120 volts [Go to resource]
Description: Evershed gravity controlled voltmeter reading 0 to 120 volts, sectioned. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1909-69/1 Go to resource More Like this...
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