
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1932
1955; 1830
1931
1930
circa 1930
1933
1934
1931
2000-100 BCE
Before 1932
1932
1931
circa 1930
1931
1930-1931
1933
1930
1933
1839 (original); circa 1988 (replica)
1933
1903 (original); 1982 (model)
1934
Before 1932
1931
1930
1801-1892 (prepared); 1946 (element replaced)
1932-1933
1930-1932
1930-1932
1930-1932
1931
4000-2001 BCE
1930 (replica); 1834 (original)
1932
1930
1936
1990-95
1834-1836
before 1930
1929
1929
circa 1932
circa 1930
1931
1930s (1888)
circa 1930
1962-05
1933