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BUREAU OF AMEEICAX ETHNOLOGY 



[KULL. 60 



to facilitate the attachment of a handle (fig. 71) ; (3) comparatively 

 narrow and thick-bodied blades of chisel, adz, and celt types; (4) 



slender blades served as knives and 

 scrapers and for the making of 

 projectile points. Abortive blades, 

 rejected because of malformation 

 or breakage under the strokes of 

 the hammer, are found in vast num- 

 bers. On the shop sites numerous 

 examples of flattish masses of chert 

 r.nd even partially worked blades 

 hi'ixv traces of use in some kinds of 

 abrading operations (figs. 72, 73). 

 Fu:. 71. Hoe blade specialized to faciii- According to Dr. Phillips, a num- 

 tate hafting. Length 4 to 8 inches, i^g^. ^f ^i^g chipped blades Well ad- 

 vanced toward the final form have been slightly ground along the 

 margin as if to facilitate the secondary chipping. It is thought that 

 the abrading stones may have been devoted to this work 



Fig. 72. Much-used aliradiug stone. (One- 

 fourth actual size.) 



Fig. 73. Rejected blade used as an 

 abrader. (One-fourth actual size.) 



There are but slight traces on tlie (luarrv-shoi) sites of the getting 



out of the smaller blades, but on the Hale place in 



shop^*^^'**^ °^ ^'^® valley this work appears to have been a leading 



feature. Here also all other classes of implements 



