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