
Difference Engine No. 1
circa 1832
circa 1832
1853-1857
1846
1838
1850
1835
1838
circa 1846
1851
1845-1855
1847-1848
1829
1860
1836
1825-1835
1850-1856
1850-1859
1845
1851
1850-1859
1853
1865
1867-1868
1849
1855
1846-1859
1854
1840
1842
1853
1850
1837
1837
1852
1834-1844
1837
1820
1822-1840
circa 1854
1850
circa 1854
circa 1840
1850-1860
1839
1843
1855
1860
1821-1831
1849
circa 1868