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