
Difference Engine No. 1
circa 1832
circa 1832
1830 (original); 1967 (model)
1829
1838
1801-1840 (original); 1901 (model)
1821
1820-1840
1825-1835
1831
1815-1825
1835
1819
1838
1775-1799 (original); 1900-1907 (model)
1837
1668; 1924
1610; 1923
1813-1814
1840
1840
1837
1837
1822-1840
circa 1840
1837
1826
1808
1837
1808
1809
1834
1829
1832
1834
1834
circa 1805
1810-1817
1893-4
1837
1805
1812
1830
circa 1808
1814
1840
1825
1836
1806
1837
1820