
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1834-1844
1837
1820
1822-1840
circa 1840
1843
1821-1831
1955; 1830
1842
1842
1835
1837
1834
1829
1832
1845
1826
1831
1842
1841
1893-4
1838
1844
1934
1837
1844
1835-1845
1863-7
1821
1830
1820-1840
1829
1840
1825
2000-100 BCE
1833
1820-1830
1831
1835
1836
1837
1840
1842
1826