Samuel Langley
American astronomer, physicist and inventor (1834–1906)
Samuel Langley
Samuel Pierpont Langley (August 22, 1834 – February 27, 1906) was an American aviation pioneer, astronomer and physicist who invented the bolometer. He was the third secretary of the Smithsonian Institution and a professor of astronomy at the University of Pittsburgh, where he was the director of the Allegheny Observatory.
Read on Wikipedia · Image Smithsonian Institution; credited to Langley himself by their archive., Public domain
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