
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1903
1830 (original); 1967 (model)
1902
1898
1899
1898
circa 1900
1901
1900
1955; 1830
1899
1899-1901
1934
1898
1900
2000-100 BCE
after 1903
1904
1898
1899
1901
circa 1900
1904
1901
1901
1901
1902
1903
1903
1898-1899
1902
1872 (original); 1909 (model)
1900
1899
1899
1901
1900
1902
1899
1839 (original); circa 1988 (replica)
1900
circa 1900
circa 1900
1899
1901
1901
circa 1900
1903
1903 (original); 1982 (model)