
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
1878-1879
circa 1871
1870
1879
1872
1870
1879
1871
1875
1868
1775-1799 (original); 1900-1907 (model)
1871
1839 (original); circa 1988 (replica)
1870
1873
1874
1879
1877
1878
circa 1880
1872-1880
1934
1879
circa 1868
1870-1880
1875
1873
1893-4
1880
2000-100 BCE
1870s
1875
1870-1880
1879
1876
1878
1870-1877
1870-1880
1876
1872 (original); 1909 (model)
1870
1875
1870-1875
1879
1955; 1830
1872
1880
circa 1880