
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1944
1938 and 1951
1943
2000-100 BCE
1955; 1830
1801-1892 (prepared); 1946 (element replaced)
1839 (original); circa 1988 (replica)
1944
4000-2001 BCE
1903 (original); 1982 (model)
1943
1990-95
1944
1943
1943
1943
circa 3000 BCE
2000-1350
1950-1900
1943
1972-3
2000-1000
1950-1920
circa 1943
2000-800
1943
1944
1943
1943
1943
1943
1971-1900
1943
1943
1943
circa 1943
1943
1943
1944
1943
1943
1943
1943
1965-1900
15/7/27
1944
1944
15/7/27