
Difference Engine No. 1
circa 1832
circa 1832
1829
1852
1775-1799 (original); 1900-1907 (model)
1831
1849
1820
1830 (original); 1967 (model)
circa 1842
1846
1854
1845-1855
1832
1856
1830
1840
1835
1830-1850
1848
1830-1840
2000-100 BCE
1840
1851
1934
1821-1850
1820-1830
1822-1840
1820
1850
1855
circa 1854
circa 1840
1853
1850
1834
1834
1842
1849
1842
1850
1830-1850
1837
1845
1845
1837
1837
1834-1844
1845
1837
1853