"A reverbatory type of gas furnace differs from the oil furnace in having the flames brought down through the roof." —Encyclopedia Britannica, 1910

Reverbatory Furance

"A reverbatory type of gas furnace differs from the oil furnace in having the flames brought down through…

Furnace used in smelting ore; its' doors can be closed to control the air flow/oxygen.

Reverbatory Furnace

Furnace used in smelting ore; its' doors can be closed to control the air flow/oxygen.