
Difference Engine No. 1
circa 1832
circa 1832
1838
1835
1838
1829
1836
1825-1835
1840
1842
1837
1837
1834-1844
1837
circa 1840
1839
1843
1841
1837
1839
1838
1835
1837
1834
1829
1832
1834
1834
1826
1831
1842
1955; 1830
1826
1842
1842
1840
1841
1893-4
1844
1934
1837
1844
1830
1840
1825
1837
2000-100 BCE
1833
1831
1863-7
1829