Last Updated: Sep 19, 2016 Views: 32
Take a look at The Corning Museum of Glass catalog: Medieval Glass for Popes, Princes, and Peasants. Text: David Whitehouse, William Gudenrath, and Karl Hans Wedepohl. Corning, NY: Corning Museum of Glass, 2010.
The publication addresses your questions about furnaces, equipment, and chemical makeup of the glass as well as images of medieval furnaces.