
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1938
1937
1938
1938
1938
1938
1938
1938
1938
1937
1938
1937
1955; 1830
1938 and 1951
1938
2000-100 BCE
1937-1937
1937-1938
1937-1938
1903 (original); 1982 (model)
1938
1937
1937
1938
1839 (original); circa 1988 (replica)
1801-1892 (prepared); 1946 (element replaced)
1937
1938
1938
1990-96
1938
1937-1938
1937
4000-2001 BCE
1990-95
2800 BCE
1937
circa 3000 BCE
1798 (original); 1977 (model)
2050-1750 BCE
1935; 1958
1938
1937
1960-1979
1879 (1956)
1937
2000-1001 BCE
1940-03