78 



SCIENCE PROGRESS 



of such forms was due to entirely independent reinvention of 

 the axe with lugs in South America, without any intermediate 



20 to 36. — Forms of tools peculiar to Egypt. 



example. The form is a natural one to adopt in hammered 

 copper, for getting a firm attachment to the handle. 



Other adaptations of the axe were the large blade of curved 

 outline on the end of a pole (fig. 24), the half-round halberd 



