A STUDY OF PREHISTORIC ANTHROPOLOGY. 



647 



heavy specimens show a groove, as do the axes, which have served for 

 the attachmeut of a handle. These are called mauls. No. 78, granite, 

 Colorado, weighs 11 i^ounds. Many specimens which have been named 

 hammer-stones are flat or oval pebbles, with an intentional worked de- 



Fig. 22. 

 Grooved Axes and Hammer Stones. (Nos. 72 to 77, l size; Nos. 78, and 80 to 82, 4 sizo.) 



pressiou in the center of sometimes one, sometimes both, sides. These 

 implements have been found over a large portion of that world which 

 belonged to prehistoric times. They arc supposed to have been used 



