Fig. 527.—Clay nucleus for a vessel.
Fig. 528.—Clay nucleus shaped to form the base of a vessel.
After this discovery was made, the molding of large vessels was no longer accomplished by the spiral method exclusively. A lump of clay, hollowed out (see Fig. [527]), was shaped how rudely so ever on the bottom of the basket or in the hand (see Fig. [528]), then placed inside of a hemispherical basket-bowl and stroked until pressed outward to conform with the shape, and to project a little above the edges of its temporary mold, whence it was built up spirally (see Fig. [529]) until the desired form had been attained, after which it was smoothed by scraping (see Fig. [530]).
Fig. 529.—Clay nucleus in base-mold, with beginning of spiral building.