374 



GENERAL SCIENCE 



of the world to a better understanding of each other and 



to minimize the differences due to racial tendencies and 



environment. 



Man's Tools and Weapons. --The arts which man 



has used to defend and maintain himself depend so much 



on the use of tools and 

 weapons that some attention 

 may well be paid to them. 

 Man is distinctly a tool- 

 making animal. 



The club was probably the 



FIG. 331. -Ancient Grinding Stones. firgt t()()1 uged fey m ^ and 



it was used principally as a weapon of defense. For 

 centuries he delighted in clubs ranging from the formidable 

 looking knotty ones to the intricately carved clubs which we 



FIG. 332. Stone Hatchet, Stone Hammer, Stone Maul. 



see in the museums to-day. The hammer was a club modi- 

 fied for use as an implement of manufacture. It was a 

 great step in advance when a handle was attached to a 

 rounded stone to make a hammer (Figure 332). Later 



