32 



SCRAPERS. 



Fig. 11. Tj'pical scrapers. Natural size. 



The method of making this tool seems to have de- 

 termined its form. It is always a flake with one flat 

 side showing no chipping. On this side it was evidently 

 detached from a larger piece of chert. Then the edges 

 were trimmed and straightened by small flaking on the 

 outer convex edges. This was the easiest and quickest 

 way of making an edged tool from chert. Some flakes 

 have been put into service without any finishing what- 

 ever, as is evident from their worn unchipped edges. 



