
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1825-1835
1775-1799 (original); 1900-1907 (model)
1830
1820
1821
1829
1837
1837
1837
1820
1821-1831
1955; 1830
1835
1837
1834
1829
1832
1826
1831
1893-4
1838
1934
1837
1863-7
1821
1830
1829
1825
2000-100 BCE
1833
1820-1830
1831
1836
1837
1837
1826
1838
1834
1834
1830
1826
1831
1824
1833
circa 1821-1825
1838
1832