
Difference Engine No. 1
circa 1832
circa 1832
1850-1860
circa 1846
1835
1850
1860
1845-1855
1858
1846
1853-1857
1847-1848
1838
1840-1851
1853-1857
before 1857
circa 1848
1830
1839 (original); circa 1988 (replica)
1775-1799 (original); 1900-1907 (model)
1850
1851
1830-1850
1840
1860
1850-1859
1851
1850-1859
1837
1837
circa 1854
1850
circa 1854
circa 1840
1850-1860
1860
1849
1842
1840-1850
1845
1842
1856
1893-4
1934
1830
1840
1837
1845
1840
1845
1834