
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1946
1948
1947
1947
1946; 1946
1947
1947
1948
1946
1948
1946
1946-1948
1946
1948
1955; 1830
1948
1938 and 1951
2000-100 BCE
1946
1948
1903 (original); 1982 (model)
1948
1948
1839 (original); circa 1988 (replica)
1801-1892 (prepared); 1946 (element replaced)
1947-1948
1946-1948
1948
1990-96
1947
circa 1947
4000-2001 BCE
1948
1990-95
1948
2800 BCE
22 June 1948
1947
circa 3000 BCE
1948
1798 (original); 1977 (model)
2050-1750 BCE
1935; 1958
1948
1946-07-07
1947
1960-1979
1879 (1956)