FLINT FLAKES. 



89 



it becomes flat, and may be propagated through a length of 

 as much as thirteen inches, thus forming a blade-like flake 

 (figs. 82 89), with a triangular cross section (fig. 90). The 

 consequence is, that a 

 perfect flint flake will 

 always have a small 

 bulb, or projection (fig. 



FIG. 82. 



FIG. 83. FIG. 84. 



83 a), at the butt end, 

 on the flat side ; this 

 has been called the 



I 



FIG. 81. 



Flint core or nucleus. Flint Flakes. Denmark. 



bulb, or cone, of percussion. After the four original angles 

 of a square block have been thus flaked off, the eight new 

 angles may be treated in a similar manner, and so on. Fig. 

 81, and pi. 1, fig. 6, represent blocks, or cores, from which 

 flakes have been struck off. A flake itself is represented in 

 pi. 1, fig. 7, and a very long one from Fannerup in Jutland 



