
Difference Engine No. 1
circa 1832
circa 1832
1834
1832
1825
1826
1834
1834
1829
1815
1815
1821
1830
1816
1835
1821-1831
1815-1825
1831
1820
1955; 1830
1934
1826
1825-1835
1815
1835
1893-4
1863-7
1829
2000-100 BCE
1833
1820-1830
1831
1826
1815-1825
1830
1826
1831
1830
1829
1930 (replica); 1834 (original)
1821
1830
1990-96
1833
1828
1820
1823
1815
1825
1820
1821