BY FRITZ NOETLING, M.A , PH.D. 61 



20. Thei'L! is reasoii to believe that there was a desire 

 to produce a flake of a certain weight and size, irrespective 

 of shape, when a parent block was broken, no matter how 

 suitable the other flakc3 that fell off may have been, but 

 the Indical face, particularly of external flakes, may have 

 been subsequently trimmed. The inability to trim the 

 Indical face probaLly accounts for the large number of un- 

 finished rejects. 



21. The accidental marks of percussion resulting when 

 the flake was struck off the parent block appeax on the 

 Pollical face only, and their negatives can be seen on the 

 core. (Any marks of percussion appearing on the Indical 

 face are either the negatives! of an earlier flake, or clue to 

 subsequent trimiiDng.) These marks are : cone of percus- 

 sion, scar of percussion, radiating fissure of percusssion, 

 concentric v/rinkles of percussion. The three first appear 

 at the proximal end, while the last may spread over the 

 whole surface. The process of percussion appears at the 

 edge between Peixussion and Pollical face, and marks the 

 point, wh-^re the blow fell. 



22. If a wrinkle of pei-cussion coincides with the edge 

 of a flake, the edge is rounded instead of sharp, and this 

 gave probably rise to marginal sharpening by striking off 

 small fl.i.kes along the edge. 



23. Thovigh the essential character of the tero-watta 

 is its unsymmetry in two directions, there is good reason 

 to believe that pertain specimeiis show an intentional out- 

 line, produced by marginal trimming. 



24. There is no evidence to show that the tero-watta 

 were manufactured in advance of their use; in all proba- 

 bility they were only manufactured when required, and 

 imnediatel)^ discarded afterwards- 



25. It appears that sometimes attempts were made to re- 

 chip a previously discarded tero-watt.a., but there is no evi- 

 dence to show that these attempts were completed. 



26. The tero-watta was a universal instrument, adapt- 

 ed for all purposes alike, but never used as a weapon. 



27. The reasons given under 24 and 26 explain the 

 enormous frequency of the tero-watta. 



