
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1947
1955; 1830
1946
1938 and 1951
1946
2000-100 BCE
1946
1947
1946
1839 (original); circa 1988 (replica)
1947
1801-1892 (prepared); 1946 (element replaced)
1947
4000-2001 BCE
circa 1947
1947
1903 (original); 1982 (model)
1990-95
1947
1947
1947
1946
1946
1947
1947
1947
1946
circa 3000 BCE
2000 BCE
post 1946.
1946
1946
1946
1946
1946
1947
30-300
2000-1350
2050-1750 BCE
10,000-2,000 BCE
1950-1900
1947
1947
Post 1947
1952-3
1952-3
4000-30 BCE
10000-5000 BCE