EXPLANATORY AND INTRODUCTORY. 



15 



Age in Europe and America. In figure 1, are given, 

 from Nilsson and others, tracings of some common 

 forms of arrow and spear heads of the best and 



Fig. 4. IMPLEMENTS OF POLISHED STONE, NORTH AMERICA. 

 (Partly after Squier.) 



the rudest styles of chipped flint, one of them being 

 a weapon of the ancient Amiens type. In figure 2 are 

 some similar tracings from Squier' s memoir on the 



