
Difference Engine No. 1
circa 1832
circa 1832
1846
1838
1835
1838
circa 1846
1829
1836
1825-1835
1845
1840
1842
1837
1837
1834-1844
1837
1820
1822-1840
circa 1840
1839
1843
1821-1831
1841
1837
1840-1845
1839
1838
1808
1809
circa 1810
1835
1837
1834
1829
1832
1834
1834
1845
1845
1812
1826
1831
1807
1815
1815
1842
1955; 1830
1826
1808
1842