These objects form a rich and comprehensive historical and technical archive of all aspects of metallurgy, including the processes of smelting, working, physical testing and assaying.
2022
1696-1700
before 1889
1979
1860
1976
1974
1925-1935
2007
1956
1996
1970
1800
1890
1967-1968
1925
1965-1975
1972