
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1932
1931
1933
1934
1931
2000-100 BCE
Before 1932
1932
1931
1931
1955; 1830
1933
1933
1839 (original); circa 1988 (replica)
1933
1934
Before 1932
1931
1801-1892 (prepared); 1946 (element replaced)
1932-1933
4000-2001 BCE
1932
1931
1903 (original); 1982 (model)
1936
1990-95
1834-1836
circa 1932
1962-05
1931
1933
1932
1933
1960-1979
circa 1932
1933
1932
1932
1931
1931
1931
1932
before 1932
1932
1931
1931
1933
1970-1900