
Difference Engine No. 1
circa 1832
circa 1832
1846
1838
1835
1838
circa 1846
1836
1845
1840
1842
1837
1837
1834-1844
1837
circa 1840
1839
1843
1841
1837
1840-1845
1839
1838
1835
1837
1847
1834
1832
1834
1834
1845
1845
1842
1955; 1830
1842
1846
1842
1840
1841
1893-4
1846
1844
1934
1837
1844
1840
1837
2000-100 BCE
1833
1835-1845
1863-7