
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1830 (original); 1967 (model)
1885
1875
1880
1869
1870-1880
1879
circa 1885
1884
1867-1868
1875
1884
1877
1955; 1830
1867
1867
1872
1879
1876
1878
1872-1880
1867
1870-1881
1893-4
1934
1870-1877
1880
1875
2000-100 BCE
1870-1880
1875-1885
1876
1872 (original); 1909 (model)
1875
1884
1882
1870
circa 1868
1879
1867
1866
1870s
1872
1872
1880
1873