Pictorial Parade No. 214 - Through the Fire

Load after load of the mixture, called ‘frit', as it has been for centuries, is pounded and pushed into a furnace, a modern practice in a craft more than 5,000 years old.

– From the narration

Rock, sand and stone: passing through the fire to produce every year 20,000,000 feet of sheet glass.

– From the narration