
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1924
1955; 1830
1925
1924
1925
1923
1934
2000-100 BCE
1923
1925
1924
1801-1892 (prepared); 1946 (element replaced)
1924
1930 (replica); 1834 (original)
1839 (original); circa 1988 (replica)
1925
1925
1924
1924
1923
1923
1925
4000-2001 BCE
1903 (original); 1982 (model)
1925
1923
1923
1923
1934
1923
1923
1924
1936
1990-95
1610; 1923
1834-1836
1924
1925; 1862
1925
circa 1925
1962-05
1668; 1924
1960-1979
circa 1925
1925
1925
1923
1925