CHIPPED SPADES. 



137 



It is used liere, however, to denote more especially the disks or almond- 

 shaped pieces of flint or chert sometimes found cached in considerable 

 numbers. 



Perkins ' records the discovery of such caches in Vermont; an excep- 

 tional case, as they are seldom found outside of the Mississippi valley. 

 The southern portion of Illinois has furnished more than any other 

 section ; those found there are almost invariably made from nodules of 

 bluish gray horustoue, the concentric lines being strongly marked.- 



Fio. 172.— Chipped spade. 



The Bureau has secured a large number from southern Illinois, 

 ranging from 3J to 7i inches in length, some nearly circular, others 

 having a length nearly twice the breadth. All have secondary chip- 

 ping around the edges. Many of the larger ones and most of the 

 smaller have the edges more or less worn or polished in such manner 

 as would result from use as knives or scrapers. A typical specimen is 

 shown in figure 175. 



* 



'Proc. A. A. A. S., vol. xxxi, p. 592. 



'Sincethis was written aeveral thousand specimens have been found in a small mound near Chil- 

 licothe, Ohio. The nearest point at which similar material is known to exist is between Corydon 

 and Leavenworth, Indiana. 



