ss 



SCIENCE PROGRESS 



the flat ventral surface, demonstrating that the maker of the 

 implement delivered all his blows upon this flat surface. And 

 any one experienced in the flaking of flint would follow his 

 example, as the more uneven dorsal surface would afford a 

 much less satisfactory striking-platform upon which to deliver 

 flake-removing blows with precision. The specimen is D- 

 shaped in section. Such an implement would be of service 

 for scraping purposes, and the type is frequently met with 



MT 



ftlHT 



TOST. 



SSCttON. 



K>ST, 



UfT UtttftAl. WftfNCt . ,, 



WT 



(\HT 



fcV&flT UttEfcAV. 5U«,f ACE . 



Fig. 2. 



in the high plateau gravels of Kent, and in other ancient 

 deposits of pre-palaeolithic age. 



Fig. 2. — Represents another very primitive type of flint 

 implement often found in association with the form represented 

 in fig. i. This specimen (fig. 2), however, exhibits an advance 

 on the first described implement. It will be seen that another 

 hollow has been flaked in the side of the stone opposite to that 

 shown in fig. 1, and that the specimen has now assumed a 

 definite pointed form. The production of this extra hollow 



