12 Schwartz & Beevor, Dawn of Human Intention. 



the Tasmanian baskets " were a few flints and stones and 

 a little dried grass, from which circumstances I conclude 

 they produce fire by collision." 



(44) Ig. Throwing Stones. These, if this be the 

 nature of their use, are of a somewhat indeterminate 

 character in that they bear no special traces of dressing 

 for prehension or of the work performed. Their general 

 characteristics may be stated as consisting of a polyhedral 

 form, made up of natural and artificially chipped faces 

 irregularly distributed, which present a number of cutttng 

 edges and points ; the size is such as to be suitable for 

 throwing. 



(45) Class J J. Pushing Tools. These consist of a 

 fragment of stone held between the thumb and index 

 finger, the cutting edge being at the end away from the 

 operator. Their special characteristics consist of a plane 

 surface under the cutting edge or edges, the dressing for 

 prehension which consists in the blunting of the edges at 

 the sides, and in many instances in the formation of 

 distinct notches for the fingers and thumb. 



(46) These notches must be carefully distinguished 

 irom the notches so frequently formed on the working 

 edge of the tool due to re-sharpening, for the reason given 

 later in the section dealing with sharpening. 



(47) The various forms of push plane are shewn dia- 

 grammatically in Fig. 2. In each case the cutting edge 

 is shewn with a double line, and the usual positions for 

 the dressing for prehension with a broken line. 



(48) Each of these various designs has its obvious 

 advantages for certain classes of work, but it must be 

 understood that the diagram is intended to represent the 

 initial forms of the implements, and that after being 

 re-sharpened several times these forms would be somewhat 

 modified. For instance, the rectilinear form would after 



