
Difference Engine No. 1
circa 1832
circa 1832
1838
1830 (original); 1967 (model)
1829
1842
1837
1837
circa 1840
1842
1841
1835
1837
1829
1826
1831
1841
1838
1846
1844
1837
1844
1830
1840
1833
1831
1836
1842
1838
1834-1844
1837
1843
1955; 1830
1846
1834
1832
1845
1842
1893-4
1934
1835-1845
1863-7
1829
1825
2000-100 BCE
1835
1837
1840
1826
1845
1834