
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1926
circa 1925
1926
1955; 1830
1924
1926
1925
1925
1925
1934
2000-100 BCE
1926
1925
1990-96
1926
1926
1839 (original); circa 1988 (replica)
1930 (replica); 1834 (original)
1925
1925
1801-1892 (prepared); 1946 (element replaced)
1925-1926
1926
1934
1925
1903 (original); 1982 (model)
4000-2001 BCE
1990-95
circa 1930; 1920
1925
1730-1760 (original); 1931-1939 (replica)
1834-1836
1925; 1862
1926
2800 BCE
circa 3000 BCE
2050-1750 BCE
1798 (original); 1977 (model)
1936
1925
circa 1925
1925
1925
1960-1979
2000-1001 BCE
circa 1925
1879 (1956)
700 BCE; 1931