
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1928
1930
circa 1930
1924
1930
circa 1930
1928
1928
1955; 1830
1928
1928
1930
2000-100 BCE
before 1928
1934
1929
1903 (original); 1982 (model)
1930 (replica); 1834 (original)
1839 (original); circa 1988 (replica)
1801-1892 (prepared); 1946 (element replaced)
1930
1990-96
1930
1928
1928
1930
4000-2001 BCE
1930
1934
1990-95
1930s
circa 1930; 1920
1930
before 1930
1730-1760 (original); 1931-1939 (replica)
1929
1834-1836
1930s
2800 BCE
1929
1928
circa 3000 BCE
1930
1798 (original); 1977 (model)
circa 1930
1930s (1888)
2050-1750 BCE
1928