
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1815-1825
1825-1835
1830
1821
1775-1799 (original); 1900-1907 (model)
1820
1829
1837
1837
1934
1830
1825
1837
1826
1834
1834
1835
1821-1831
1834
1832
1829
1837
1814
1833
1837
1837
1820
1955; 1830
1837
1826
1831
1815
1815
1893-4
1838
1863-7
1821
1829
1816
2000-100 BCE
1813
1820-1830
1831
1836
1838
1815
1838