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A great portion of those used by the Pimas were made by the Hohokam. However, the Pimas always had a few arrowhead makers who worked in obsidian, shale, or flint. They produced small heads varying from 1 to 2½ cm. in length by 1 in breadth. Those represented in figure 30 are old points. The heads are stemless, sometimes having shoulders for the sinew seizing. One man was found who continues to make arrowheads, which he sells to the whites.

The Pimas had very little need for grooved stones for straightening arrows as the arrowwood is naturally as straight as could be desired. It is probable that the stones of this kind found in the ruins were used merely for polishing. The Pimas used them scarcely at all.

These are frequently seen around the ruins of Arizona, but the Pimas seem to have little use for them.

Three stones, each about 15 cm. in diameter, were used to support the cooking pots over the fire. They have been largely supplanted by an iron frame obtained from the agency blacksmith. These stones were picked up when needed and little effort made to preserve then.

Crystals and curiously shaped stones of all kinds were preserved in the outfits of the medicine-men. Several such specimens were purchased and some were found in a cache among the hills (fig. 32).