
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1830 (original); 1967 (model)
1885
1875
1880
1869
1888
1870-1888
1886
1875
1884
1877
1884
1870-1880
1867
1867
1876
1878
1872-1880
1893-4
1934
1879
1880
2000-100 BCE
1875-1885
1875
1886
1884
1882
circa 1885
1870
1888
circa 1868
1875
1872
1867
1870-1881
1870-1877
1876
1872 (original); 1909 (model)
1867
1872
1870s
1867-1868
1955; 1830
1879
1870-1880