
Difference Engine No. 1
circa 1832
circa 1832
circa 1846
1835
1847-1848
1838
1846
1825-1835
1830
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
circa 1848
1829
1840
1837
1837
circa 1840
1849
1842
1845
1842
1934
1830
1840
1825
1837
1845
1840
1826
1845
1834
1834
1835
1849
1834
1832
1842
1846
1848
1837
1826
1831
1841
1893-4
1838
1846
1844
1844
1835-1845
1863-7
1829