holmes] 



ABORIGINAL AMERICAN ANTIQUITIES PART I 



308 



This method is capable of triiuniiiig the edges of flakes or of blades 

 already well advanced, but apparently is incapable of specialization 



-=''^^^^1 



Fig. 100. Practiiro liy rostins a blade upon an anvil and tapping it from above witti a 



hammer. 



of any other kind, unless, indeed, a sharp-edged rest is employed as 

 shown in figure 170. By this method it is possible by reversing the 



.<2? 



Fig. 170. Notching a blade by resting it on a sharp-edged anvil and tapping it with a 



hammer. 



piece to be chipped from time to time to chip out notches of con- 

 siderable depth. 



38657°— 19— Bull. 60, pt i 21 



