
Difference Engine No. 1
circa 1832
circa 1832
1830 (original); 1967 (model)
1829
1838
1821
1801-1840 (original); 1901 (model)
1820-1840
1815-1825
1835
1831
1825-1835
1838
1819
1775-1799 (original); 1900-1907 (model)
1837
1668; 1924
1610; 1923
1840
1840
1837
1837
1833
1837
1820
1822-1840
circa 1840
1839
1821-1831
1841
1837
1955; 1830
1826
1837
1838
1835
1837
1836
1834
1829
1832
1834
1834
1826
1815
1815
1831
1893-4
1934
1837
1821