AS THE BIOLOGIST SEES IT 



stages of flaking are commonly known in 

 connection with all of prehistoric man's 

 later Pleistocene life, and even with 

 present human life as exhibited by the 

 more primitive living peoples, are, in 

 their earliest forms known as eoliths 

 the subject of much discussion. It has 

 been shown that a certain simple flaking 

 of flint stones can occur by natural 

 physical means without the aid of living 

 creatures. But many of these Pliocene 

 or very early Pleistocene eoliths show such 

 a kind of flaking, affording cutting edges 

 and grips for firm holding in the hand, 

 fitting them to be very simple weapons or 

 tools, that many competent anthropol- 

 ogists insist that they must have been 

 produced by living creatures of sufficient 

 wit and dexterity to make tools out of the 

 material at hand most available for this 

 purpose. Indeed, we can well imagine 

 the first human beings picking up natur- 

 ally partly flaked flints and then moving 

 on to better tools or weapons by intelli- 

 gently and deliberately further flaking 

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