Notes concerning “Refractories”

• Regenerator gas kiln 2016-09-05 (updated 2017-04-10) (9 minutes)
• Millikiln 2017-01-17 (updated 2017-03-02) (4 minutes)
• An electric furnace the size of a sake cup 2017-02-25 (updated 2017-03-02) (10 minutes)