"We do," was the quick reply. "Our finest grade of porcelain has little or no phosphate of calcium, or ground bone, in it. But it is in consequence very costly, and therefore to meet the demands of the market we also manufacture a porcelain slightly strengthened with a bone element. Nevertheless this is composed of such a wonderfully blended body that it is as exquisite as any of the most beautiful English wares. Personally I prefer it to a pure feldspathic china.
"My questions are all answered now," laughed Theo. "Shall we go up to the clay-shop?"
They rang for an elevator and stepped in.
"Next floor, O'Keefe," said Mr. Marwood to the operator. "I am going to teach this lad how to make dishes."
CHAPTER XVI
DISHES, DISHES EVERYWHERE!
Clay," began Mr. Marwood as they went along, "can be shaped in any one of several ways, you know: either by throwing; by turning; by pressing it into hollow moulds; by shaping it by hand over another type of mould; by pressing it into flat ware such as platters and plates; by making it by machinery over moulds as is done by hand; by casting it into the desired form; and by compressing it."
Theo looked puzzled.