
Difference Engine No. 1
circa 1832
circa 1832
1829
1835
1838
1839 (original); circa 1988 (replica)
1801-1840 (original); 1901 (model)
1840
1842
1837
1837
1837
1822-1840
circa 1840
1839
1841
1837
1839
1826
1842
1837
1838
1833
1835
1829
1834
1829
1832
1834
1834
1826
1831
1842
1840
1934
1837
1830
1840
1825
1842
1836
1825-1835
1955; 1830
1837
1841
1893-4
1838
1863-7
2000-100 BCE
1831
1829