San'diver (Fr. suint de verre, 'scum of glass'), a product of the glass furnaces. When the materials used in the manufacture of glass are melted a scum arises which has to be removed: this is called sandiver, and is, when powdered, used as a polishing material.
San'diver
Chambers's Encyclopaedia, Volume 9: Bound to Swansea, p. 143
Source scan(s): p. 0154