P^Ip. ^o.' .f4T' DEMERY SITE — WOOLWORTH AND WOOD 



117 



e 



cm 



Figure 22. — Artifacts of bone, antler, and shell, a, Scored bison rib. b. Serrated rib tip. 

 c, Arrow shaft wrench, d-e, Shell scrapers. /, Antler cylinder, g, Scapula "cleaver." 

 h, Bone knife. 



Shaft wrenches (13 specimens) : 



These tools were made by drilling one or two roughly circular holes 

 through a large rib, and rounding the rib ends. The three complete 

 specimens are 240 and 295 nrni. long ; one of these has two oval holes 

 spaced 75 mm. apart (fig. 22, <?). The other two wrenches have a 

 single, centrally located hole. All holes are oval, and all except one 

 have beveled or rounded edges; diameters range from 11 to 16 mm. 



