FEWKeEs] MINOR ANTIQUITIES 129 
Perforated stones——Among the problematic stones from Casa 
Grande are several specimens (pl. 66, a, b), measuring from a few 
inches to 2 feet in length, with a large per- 
foration near the margin. None of these 
stones are polished, and their rough exterior 
shows no signs of decoration. The use to which 
these objects were put is unknown, but their 
presence in all collections from the Gila and 
Salt River ruins indicates that they were im- 
portant.t 
An irregular stone slab having an ovoid 
perforation (fig. 31) may be merely a dis- 
carded paint or seed grinder, the hole through fic. 30. Paint pestle from 
it being the result of wear. The suggestion i aaa 
that it was used in a ball game as the per- a 
forated stone through which a stone ball was thrown is hardly tenable. 
Perforated disks of stone (fig. 32) are among the rare objects found 
at Casa Grande. These have the same general shape as the perforated 
Fic. 31, Perforated stone slab of unknown use. 
pottery disks which are common throughout the Pueblo area. It is 
supposed that these objects were employed in games, but some speci- 
mens were undoubtedly used as spindle whorls. The larger stone 
disks, of which there are several in the collection, varying in size and 
degree of finish, were probably used as covers for mortuary jars. 
1Tt has been suggested that these objects were hung from rafters of houses or from trees or bushes and 
served as sounding stones, or gongs, to call the people together, but the fact that many of them are of soft 
nonresonant lava would seem to preclude their employment for such purpose. 
20903°—28 eTH—12 9 
