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Thomson and Houston arc lamp regulator, patent # 220,508
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Thomson and Houston arc lamp regulator, patent # 220,508

Thomson, Elihu · overall: 11 1/2 in x 6 in; x 29.21 cm x 15.24 cm

From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.

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PatentsArc LightLighting Devicesarc lamp regulatorModelsarc lampWork and Industry: Electricity
Credit lineThomson and Houston arc lamp regulator, patent # 220,508. Thomson, Elihu. National Museum of American History. CC0.
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