
Difference Engine No. 1
circa 1832
circa 1832
1834-1836
1837
1837
1834
1832
1825
1837
1826
1834
1834
1829
1815
1815
1837
1821
1830
1814
1816
1835
1837
1821-1831
1815-1825
1837
1831
1820
1955; 1830
1934
1837
1826
1825-1835
1815
1835
1893-4
1863-7
1829
2000-100 BCE
1813
1833
1820-1830
1831
1836
1826
1815-1825
1830
1826
1831
1830
1829
1930 (replica); 1834 (original)