
Difference Engine No. 1
circa 1832
circa 1832
circa 1846
1858
1847-1848
1853-1857
1850-1860
1838
1829
1835
1860
1850
1855
1845-1855
circa 1850s
circa 1848
1849
1846
1837-1840
1844
1840
1860
1848
1858
1850
circa 1860
1834
1845-1855
1832
1845
1842
1856
1830
1840
1821-1850
1842
1842
1851
1850-1859
1853
1854
1837
1837
1860
1849
1830-1850
1846
1849
1846-1859
1853
1852