
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1815-1825
1825-1835
1830
1839 (original); circa 1988 (replica)
1820
1775-1799 (original); 1900-1907 (model)
1821
1829
1840
1837
1837
1822-1840
circa 1840
1893-4
1934
1830
1840
1825
1837
1840
1826
1834
1834
1835
1837
1820
1839
1821-1831
1955; 1830
1834
1832
1837
1829
1831
1815
1815
1841
1838
1837
1863-7
1821
1820-1840
1829
1816
2000-100 BCE
1833
1820-1830