
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1842
circa 1840
1830-1840
1834
1832
1842
1842
1837
1840
1826
1834
1834
1835
1829
1893-4
1837
1863-7
1830
1829
1840
2000-100 BCE
1833
1831
1835
1836
1837
1955; 1830
1842
1838
1841
1839
1837
1837
1831
1826
1839
1841
1838
1934
1838
1826
1839
1842
1841