
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1815-1825
1825-1835
1830
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
1821
1820
1829
1840
1837
1837
1822-1840
circa 1840
1808
1842
1845
1842
1934
1805
1812
1830
circa 1808
1840
1825
1837
1845
1840
1826
1845
1834
1834
1834
1832
1842
1893-4
1835-1845
1863-7
1805-1815
1829
2000-100 BCE
1813
1820-1830
1810-1830
1808
1809
1835
1837