Samuel Langley

Samuel Langley
Langley, c. 1895
3rd Secretary of the Smithsonian Institution
In office
1887–1906
Preceded bySpencer Fullerton Baird
Succeeded byCharles Doolittle Walcott
Personal details
Born(1834-08-22)August 22, 1834
DiedFebruary 27, 1906(1906-02-27) (aged 71)
Known for
AwardsRumford Medal (1886)
Henry Draper Medal (1886)
Janssen Medal (1893)
Signature

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.