
Difference Engine No. 1
circa 1832
circa 1832
1838
circa 1846
1835
1831
1846
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1844
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1829
1840
1837
1837
1834-1844
1837
1822-1840
circa 1840
1839
1842
1846
1842
1835
1843
1955; 1830
1837
1826
1841
1838
1835-1845
1863-7
1829
1833
1831
1836
1839
1834
1829
1832
1845
1831
1842
1840
1893-4
1846
1844
1934
1837
1844