fireclay

Nothing ever seen in Lancaster County, this stove was built of fireclay and brick; but the food it heated was honest Deitsch.

The screw threads should be filled with fireclay (as recommended by Faraday) before the joint is screwed up.

A good protection is a layer of fireclay laid upon the more delicate parts, such for instance as any screwed part.

Quarl, kwrl, n. a segment of fireclay used in making covers for retorts, &c.

The oxide is therefore mixed with coal or some other form of carbon and placed in retorts made of fireclay.