
Difference Engine No. 1
circa 1832
circa 1832
1847-1848
circa 1846
1835
1848
1838
1839 (original); circa 1988 (replica)
circa 1848
1844
1801-1840 (original); 1901 (model)
1846
1845
1840
1842
1837
1837
1837
circa 1840
1839
1837
1840-1845
1839
1846
1837
1838
1833
1835
1835-1845
1847
1834
1832
1834
1834
1845
1845
1831
1842
1846
1844
1934
1837
1844
1830
1840
1842
1836
1843
1837
1841
1893-4