
Difference Engine No. 1
circa 1832
circa 1832
1835
1829
1825-1835
1820
1821-1831
1835
1834
1829
1832
1834
1834
1826
1831
1815
1815
1955; 1830
1826
1893-4
1934
1821
1830
1816
1825
1815-1825
2000-100 BCE
1833
1820-1830
1831
1815
1863-7
1829
1829
circa 1821-1825
1821
1821
1832
1772 (original); 1919 (model)
1826
1819
1990-96
1823
1824
1815-1825
1830
1830-1835
1830
1826
1831
1815