Pottery making: an illustrated text book on art pottery making for teachers and artists (1914)
Webb, Judson Thomas, 1859- · Chicago, Lewis institute · leaf 46
be-gins to get red inside, when all the oil maybe turned on that can be consumed withoutmaking smoke. Itis impossible toburn oil success-fully without suffi-cient d r a u g h t.Either the flameswill p roclncesmoke, or it willtake too long toreach the degree ofheat r equire d.Good combustionproduces… … The temperature is registered with an 06cone placed in the kiln about 5 back fromthe spy hole. The cone can be seen as soonas it becomes light in the kiln. As the heatincreases more oil is added, until the conebegins to bend at the top. It will soon turninto a hook when the oil should be shut…
Pottery
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