
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
1878-1879
1879
1872
1870
circa 1871
1875
1880
1879
1775-1799 (original); 1900-1907 (model)
1871
1830 (original); 1967 (model)
1870
1879
2000-100 BCE
1882
circa 1868
1870s
1875
1934
1880
1879
1870-1880
1870-1880
1879
1875
1877
1955; 1830
1878
1870-1875
circa 1880
1871
1879
1876
1878
1872-1880
1870-1881
1893-4
1870-1877
1870-1880
1876
1872 (original); 1909 (model)
1875
1870
1872
1880
1872
circa 1880
1870-1880