This scatter plot of alloys used in the study group analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) illustrates an increased concentration of zinc in aquamanilia produced in Nuremberg at the beginning of the 15th century. See Dandridge, Pete. 2006. “Exquisite Objects, Prodigious Technique. Aquamanilia, Vessels of the Middle Ages.” In Lions, Dragons, and Other Beasts: Aquamanilia of the Middle Ages, Vessels for Church and Table, edited by Peter Barnet and Pete Dandridge, 35–56. New Haven, CT: Yale University Press..