MancJiestey Memoirs, Vol. liii. (1909), No. 8. 7 



(25) la. Hanivier Stones. These consist usually of 

 globular or cylindrical stones, one end or portion of vvhici\ 

 is adapted to be held in the palm of the hand, the other 

 end in the case of flint or siliceous material presents a 

 rugous surface formed by the juxtaposition of a number 

 of little cones of percussion which are the product of the 

 blows. {Fis^. I.) 



//uf'""rr 



1^1/ 



C^c^^/rfy Tho/.-i 



Fig. I. 



CHARACTERISTIC TRACES OF WORK ON STKIKINC. TOOLS. 



When used for pounding soft material the faces on the hammer and anvit 

 are marked with cones of percussion ; with hard material these are absent, 

 but the edge flaking remains. 



A. Crevassed or splintered effect of prolonged use of chopper with 

 irregular flaking on both sides of the cutting edge. 



B. Light chopping work gives only the irregular flaking. 



