132 CASA GRANDE, ARIZONA ’ [BrH. ANN. 28 
as shovels and hoes. Some were probably attached to handles (fig. 39), 
or even held directly in the hand. One or more of these are shaped 
like spades, an extension on one side serving for attachment of a 
handle; others are elongate, circular, or semicircular. 
Slate appears to have been the material most commonly employed 
in the manufacture of these implements, obsidian being better 
adapted for cutting tools. \ 
Fic. 34. Stone balls. 
Several hoe-like implements, especially those without indication of 
attachment, are chipped along the sharp edge, the opposite edge be- 
ing thicker and smooth. These (pl. 71) are more like scrapers than 
shovels, and may have been used in dressing skins. 
