
Difference Engine No. 1
circa 1832
circa 1832
1838
1802
1835
1838
1805
1829
1836
1825-1835
1806
1837
1837
1837
1820
1803-1828
1821-1831
1837
1838
1808
1809
circa 1810
1835
1837
1834
1829
1832
1834
1834
circa 1805
1812
1826
1831
1807
1815
1815
1955; 1830
1826
1808
1805
1807
1815
1810-1817
1893-4
1934
1802
1837
1863-7
1808
1807
1821