
Difference Engine No. 1
circa 1832
circa 1832
1815-1825
1819
1829
1835
1838
1839 (original); circa 1988 (replica)
1821
1801-1840 (original); 1901 (model)
1840
1837
1837
1837
1820
1822-1840
circa 1840
1839
1821-1831
1837
1839
1826
1837
1838
1833
1835
1829
1834
1829
1832
1834
1834
1812
1826
1831
1815
1815
1840
1934
1837
1821
1812
1830
1812
1814
1840
1816
1825
1836
1825-1835
1955; 1830