
Difference Engine No. 1
circa 1832
circa 1832
1838
1846
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1842
circa 1840
1830-1840
1834
1832
1845
1842
1825
1842
1837
1840
1826
1845
1834
1834
1845
1808
1808
1809
1847
1829
1815
1815
1810-1817
1837
1821
1812
1830
1812
circa 1808
1814
1840
1816
1810-1840
1810-1840
1835
1834-1844
1837
1821-1831
1842
1838
1815-1825
1841