Cyrus Alger | |
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| Born | November 11, 1782 |
| Died | February 4, 1856 (aged 73) |
| Nationality | American |
| Occupation | Metallurgist |
| Known for | “Columbiad” |
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 | This article needs additional citations for verification. (June 2024) |
Cyrus Alger (11 November, 1782 – 4 February, 1856) was a United States arms manufacturer and inventor.