For the cadmium produced in furnaces, there were five identified kinds: the first called botrytis, as being in the form of a bunch of grapes; the second, ostracitis, as resembling a sea shell; the third, placitis, for resembling a crust; the fourth, capnitis; and the fifth, calamitis, which hung around certain iron rods that were used to stir material in the furnace; being shaken off, the cadmium resembled the figure of a quill, called in the Latin, calamus.
For the cadmium generated in furnaces, there were five identified varieties: the first was botrytis, shaped like grapes; the second, ostracitis, resembling a sea shell; the third, placitis, looking like a crust; the fourth, capnitis; and the fifth, calamitis, which attached to iron rods used for stirring furnace materials. When shaken off, it took on the appearance of a quill, known in Latin as calamus.