
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1903
1830 (original); 1967 (model)
1885
circa 1897
1902
1898
1899
1898
1889
circa 1900
1884-1900
1888
before 1889
1886
1890 - 1900
1884
1901
1900
1955; 1830
1884
1895
1892-1902
About 1890
1887-1903
1896
1894
1895-1900
1893-4
1899
1890-1894
1899-1901
1934
1898
1900
1896
2000-100 BCE
1890-1900
1885-1895
1890-1899
after 1903
1892
1886
1884
circa 1885
1888
1890
1898
1890
1899