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Brush arc lamp regulator, patent # 212,183
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Brush arc lamp regulator, patent # 212,183

Brush, Charles F. · 1878 · overall: 12 in x 6 in; 30.48 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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Credit lineBrush arc lamp regulator, patent # 212,183. 1878. Brush, Charles F.. National Museum of American History. CC0.

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