
Difference Engine No. 1
circa 1832
circa 1832
1830
1821
1775-1799 (original); 1900-1907 (model)
1820
1829
1830
1825
1826
1821-1831
1832
1829
1820
1955; 1830
1826
1831
1893-4
1863-7
1821
1829
2000-100 BCE
1820-1830
1831
1826
1990-96
1830
circa 1821-1825
1824
1830
1831
1821
1821
1823-1825
1822
1826
1821
1832
1829
1832
1772 (original); 1919 (model)
1819
1823
1826
1824
1829
1829
1829
1705-1737
1828
1870-1877