
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1830 (original); 1967 (model)
1885
1875
1889
1880
1869
1888
1870-1888
before 1889
1895
1870-1880
About 1890
1879
1870-1890
1886
circa 1885
1895
circa 1890
circa 1890
circa 1890
circa 1890
1884
1867-1868
1875
1884
1877
1955; 1830
before 1889
1867
1867
1885-1894
1872
before 1889
1890
1875-1890
1879
1876
1878
1894
1872-1880
1867
1870-1881
1893-4
1890-1894
1934
1870-1877