. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . onship existed between a beads beingpunched, wrapped, annealed or finally cold worked, and the microhardness of the was a positive relationship between the final working stage and the microhardness ofthe metal, with annealed pieces being the softest and cold worked pieces being the hardest,as expected. The worked beads (mean Hv 62) were two to three times harder than theunworked cast prill tested (Hv 21). In addition, from the metallographic analysis it was clearthat annealing was not practised systemati
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . onship existed between a beads beingpunched, wrapped, annealed or finally cold worked, and the microhardness of the was a positive relationship between the final working stage and the microhardness ofthe metal, with annealed pieces being the softest and cold worked pieces being the hardest,as expected. The worked beads (mean Hv 62) were two to three times harder than theunworked cast prill tested (Hv 21). In addition, from the metallographic analysis it was clearthat annealing was not practised systematically and in some cases a final, possiblyaccidental anneal, had overprinted earlier cold work deformation. Links were like wrapped beads, bent around a flattened or rounded wire, without thejoin being closed. In many cases they were probably simply wrapped beads that had beenpulled open during use. Alternatively they could have been an intermediate stage formaking wrapped beads, or used as ornamented clips, such as the ones found on the 90 ANNALS OF THE SOUTH AFRICAN MUSEUM. Figure 10 Offcuts, or small pieces of square gold wire from Zimbabwe (SAM 7903), showing chisel cut ends (magnification 4x).
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
