
Difference Engine No. 1
circa 1832
circa 1832
circa 1846
1835
1846
1847-1848
1838
1825-1835
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
circa 1848
1830
1829
1840
1837
1837
1834-1844
1837
circa 1840
1843
1955; 1830
1842
1846
1842
1848
1835
1837
1847
1834
1829
1832
1845
1826
1831
1842
1841
1893-4
1838
1846
1844
1934
1837
1844
1835-1845
1863-7
1830
1829
1840
1825
2000-100 BCE
1833