• Pigs, Ingots, and Billets (p. 83): “The homogeneity of ingots, pigs, and other large blocks of smelted lead is not an issue…” • Melt (p. 82): “It is reasonable to assume that a given batch of molten lead exhibits sufficient mixing (such as convective stirring because of the heating process) for compositional homogeneity to develop quickly in the melt, assuming that there are no additions to the molten vat during pouring.”