MATERIAL CULTURE. •>•> 



The surface is vigorously rubbed with a rough edged 

 stone until it presents a clean-grained appearance. 

 The skin is further dried and whitened by sawing back 

 and forth through a loop of twisted sinew or thong 

 tied to the under side of an inclined tipi pole. This 



Fig. 16. Scraping a Hide. Blood. 



friction develops considerable heat, thereby drying 

 and softening the texture. As this and the preceding 

 rubbing are parts of the same process their chronological 

 relation is not absolute, but the order, was usually as 

 given above. The skin is then read}' for use. 



