
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
1840
1837
1837
1837
circa 1840
1843
1955; 1830
1842
1842
1835
1837
1834
1832
1842
1841
1893-4
1838
1934
1837
1863-7
1840
2000-100 BCE
1833
1836
1837
1840
1842
1837
1839
1838
1834
1834
1841
1839
1801-1840 (original); 1901 (model)
1833
1842
1841
1838
1837-1840
1832
1839
1772 (original); 1919 (model)
1839
1839