Glass cone

A glass cone is a glass production structure historically unique to the United Kingdom. A glass cone had a large central furnace, a circular platform where the glassblowers worked, and smaller furnaces around its wall to ensure the glass did not cool too quickly.

There are four surviving glass cones:
 * Catcliffe Glass Cone, South Yorkshire
 * Lemington Glass Works, Newcastle upon Tyne
 * Northern Glass Cone, Alloa Glass Works, a Scottish scheduled monument,
 * Red House Cone in Wordsley, granted listed building status in 1966