146 



INTRODUCTION TO THE STUDY OF [LECT. v. 



to argue. Their regularity, and the care with which 

 they have been worked to an edge, prove that they have 



FIG. 52. Flint Implement from St. Acheul, near Amiens. Natural size. 

 (In my collection.) 



been intentionally chipped into their present forms, and 

 are not the result of accident. That they are not 



