
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1945
1945
1955; 1830
1944
1938 and 1951
1944-1945
2000-100 BCE
1801-1892 (prepared); 1946 (element replaced)
1839 (original); circa 1988 (replica)
1944
4000-2001 BCE
1903 (original); 1982 (model)
circa 1945
1990-95
1945
1944
1944-1945
1962-05
1945
1960-1979
1945
1945
1944
1970-1900
1944
1945
1945
1945
1945
1945
30 CE
30 CE
1944
2686-2613 BCE
1859; 1986
before 1944
1945-50
1945
1945
1945
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
30-200
2000-1350