
Difference Engine No. 1
circa 1832
circa 1832
1847-1848
circa 1846
1851
1835
1848
1852
1853-1857
1838
1858
1839 (original); circa 1988 (replica)
1849
circa 1848
1844
1853-1857
1845-1855
1801-1840 (original); 1901 (model)
1846
1850-1856
1850-1859
1845
1851
1850-1859
1849
1855
1846-1859
1840
1842
1853
1850
1837
1837
1837
circa 1854
1850
circa 1854
circa 1840
1839
1855
1849
1837
1840-1845
1839
1857
1840-1850
1846
1830-1850
1837
1850
1838