The results obtained by Krefting's preservation-process are quite as surprising as those which are afforded by Blell’s method. Figure [29], taken from Appelgren’s work, shows the lower portion of a spear-head before and after treatment, by which it became apparent that the whole socket was plated with silver, with two engraved and gilded animal figures. Fig. [34] represents a piece of a sword, on which an inscription was brought to light by the reduction process.
Fig. 28. Krefting’s method. Iron spear-head wrapped with strips of zinc.
Fig. 29.
Iron spear-head before and after treatment by Krefting’s method.
Fig. 30. Iron pin from “Danes’ Graves,” Yorks. [Cp. Yorks. Phil. Soc. Report, 1897.]