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Joseph Henry, taken between 1865 and 1878, possibly by Mathew Brady. Joseph Henry (1797-1878) was an American scientist who served as the first Secretary of the Smithsonian Institution. From Beginnings and Future of the Arc Lamp by S M Hamill, from The Engineering Magazine, Volume VII, 1894.
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TPG34537453
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達志影像
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RF
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1800s1800s19thARC-LAMPArc-lightBrushCenturyCharlesDAVYFFaradayHUMPHRYHenryJosephMichaelSIRScientistacalternatedarcarchartworkbatteryburnburningcurrentdcdirectdynamoearlyelectricelectricalelectricityemitemittingengineeringengravingexperimentexperimentsgeneratorglowheathistoricalhistoryilluminateilluminationillustrationillustrationincandescentlamplampslightlightinglightslitno-onenobodyportraitpowervictorian