Experiment to fuse 'hard head' tin with sulphur
- Made:
- 1858
- preparer:
- John Percy
Refining of Tin. 'Hard head' fused with sulphur. Experiment by Dr. Percy, 1858. 'Hard head' being produced from roasted ores, contains little or no sulphur, and on fusing with sulphur the metals become sulphides. This is a compact, porous, regulus-like mass.
