![](https://coimages.sciencemuseumgroup.org.uk/38/769/large_thumbnail_1970_0296__0002_.jpg)
Incrustations of crystals of zinc oxide on the lining of hearth bricks on one of the blast-furnaces
- Made:
- before 1889
![Incrustations of crystals of zinc oxide on the lining bricks of](https://coimages.sciencemuseumgroup.org.uk/400/182/medium_smg00092666.jpg)
Incrustations of crystals of zinc oxide on the lining bricks of the hearth on one of the blast-furnaces of the Tredegar Iron Works, South Wales, communicated by E.A. Cowper