
Nodules of iron from foundry reclamation
1970-1990
1970-1990
1927
1780-1869
1880
1890
1931
1934-1936
1929
1910
1880
1920
1890
1850
1954-1956
1930
1940
1930-1932
1930-1932
1948-1960
1960
1801-1900
1911
1975
1900
1953
1977
71-100
300 BCE
1895-1905
1930-1932
1930-1932
1930-1932
1930-1932
1914
1850
1800
1928-1933
71-100
71-100
71-100