Fig. 2From: Chemical studies of Chinese coinage II: from Qin to Yuan (221 BCE–1368 CE)Plot of %Cu vs. %Sn in a pre-Qin coinage, with two model mixing lines (bronze plus 50/50 Cu/Pb and bronze plus pure lead) ([1]; b coinage of Qin to Eastern Han dynasties (221 BCE–220 CE: data sources as in Table 1)Back to article page