
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1946
1945
1946
1947
1955; 1830
1946
2000-100 BCE
1945
1946
1947
1944
1938 and 1951
1944-1945
1943
1839 (original); circa 1988 (replica)
1947
1947
1903 (original); 1982 (model)
circa 1945
1945-1946
1801-1892 (prepared); 1946 (element replaced)
1944
4000-2001 BCE
circa 1947
1943-1945
1947
1943
1990-95
1945
1944
1943
1947
1962-05
1944-1945
1945
1960-1979
1945
1946
1946
1943
1945
1945
1946
1946
1947
1944
1943-1945
1947