The following have been given as methods of extracting zinc from tin. (a) Raise the mixture to the vaporisation point of zinc; this involves great waste of tin. (6) Granulate the mixture, and immerse it in a solution of sulphuric acid, when the zinc will be dissolved, (e) A method employed to remove zinc from plumbers' solder is to melt the latter and stir in ground sulphur; the sulphur rises to the surface, and brings the zinc with it. This method of introducing sulphur might succeed with tin in place of the solder.