
Difference Engine No. 1
circa 1832
circa 1832
1835
1825-1835
1830
1775-1799 (original); 1900-1907 (model)
1821
1820
1829
1837
1837
1934
1830
1825
1837
1826
1834
1834
1834
1832
1893-4
1863-7
1829
2000-100 BCE
1820-1830
1835
1837
1829
1826
1831
1837
1821
1833
1831
1836
1837
1837
1820
1821-1831
1955; 1830
1826
1990-96
1830
1831
1833
circa 1821-1825
1832
1772 (original); 1919 (model)
1830-1835
1824
1823-1825