
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1928
1927
1926
1927
1930
1926
1927
circa 1930
1955; 1830
1924
1926
1927
1930
circa 1930
1928
1928
1927
1928
1934
1930
2000-100 BCE
before 1928
1926
1928
1927-1929
1930
circa 1927
1929
1990-96
1930
1926
1926
1839 (original); circa 1988 (replica)
1930
1930 (replica); 1834 (original)
1926-1928
1927
1801-1892 (prepared); 1946 (element replaced)
1926
1934
1928
1928
1903 (original); 1982 (model)
4000-2001 BCE
1930
1990-95
circa 1930; 1920
1930s