Redhot

The better kind of pottery, called in this country Staffordshire ware, is made of an artificial mixture of alumina and silica; the former obtained in the form of a tine clay, from Devonshire chiefly ; and the latter consisting of chert or flint, which is heated redhot, quenched io water, and then reduced to powder.

A child can learn the concept "hot" without the word "hot" by touching a redhot poker. The next time he sees a redhot poker he recalls his prior experience and avoids the poker.

Judging from his expression, so did Old Sam, although he wouldn't have admitted it unless his fingernails were being ripped out by redhot pincers.