
Difference Engine No. 1
circa 1832
circa 1832
1838
1835
1838
1829
1836
1840
1837
1837
1837
circa 1840
1839
1837
1839
1838
1835
1837
1834
1829
1832
1834
1834
1831
1955; 1830
1840
1893-4
1934
1837
1863-7
1830
1829
1840
1837
2000-100 BCE
1833
1831
1829
1838
1837-1840
1832
1839
1772 (original); 1919 (model)
1839
1839
1839
1990-96
1830
1830-1835
1830
1831