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Government worker testing the amount of light given off by lightbulbs circa 1938.
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Government worker testing the amount of light give...

President William Howard Taft in Masonic Regalia 1911
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President William Howard Taft in Masonic Regalia 1...

Battery Operated Tractor 1950
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Battery Operated Tractor 1950

Edison
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Edison

Thomas Edison - Menlo Park
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Thomas Edison - Menlo Park

Enchantment
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Enchantment

Edison
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Edison