
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1834
1832
1825
1837
1826
1834
1834
1829
1815
1815
1837
1821
1812
1830
1812
1814
1816
1835
1837
1821-1831
1838
1815-1825
1839
1837
1831
1820
1839
1955; 1830
1934
1837
1812
1826
1825-1835
1815
1835
1893-4
1838
1863-7
1829
2000-100 BCE
1813
1833
1820-1830
1831