Figure 8

Categorical principal component analysis (CATPCA) in the analysed assemblage of 191 objects showing the distribution of object and alloy types against (a—unalloyed copper, b—arsenical copper/bronze, c—low Sn bronze, d—high Sn bronze) the wt% sum of trace elements (Fe, Co, Ni, As*, Sb, Pb) and the CATPCA groups. *As is included in the trace elements (TE) as for most of the samples it is found < 1 wt%. **Bz = bronze.