124 



COLUMBIAN HISTORICAL EXPOSITION AT MADRID. 



There is a class of Avell-fiuished and finely polished implements of which compact 

 greenstone and chlorite and calcite were favorite materials, the use of which is 

 unknown (fig. 58). They Avere broad, thin, and most of them flat. They were 5 

 or 6 inches wide, from 8 to 10 inches long, and rarely more than one-half an inch 

 thick. The edge was rounded off so as to render cutting impracticable. They 

 were provided with an indefinite handle, and many have a hole drilled at the 

 commencement of the handle. They may have served for scraping or polishing, 

 but no traces of use have been found which would indicate their purpose other 

 than as mentioned. While these objects are rare in the United States most of 

 them have been found in the South. 



IG3 



Fig. 45. 

 PESTLES. 



163, sandstone, Dos Pueblos, California; 164, sandstone, Dos Pueblos, California]; 165, amygdaloid, Crescent City, Califo 

 mound; 166, sandstone, Rhode Island ; 167, greenstone, Alaska ; 172, greenstone, Alaska. 



Shell, horn, and bone served the prehistoric man like stone and copper as material 

 for implements and ornaments (tigs. 59, 60). They were made into axes, hatchets, 

 swords, daggers, poiguards, wedges, points, perforators, harpoons, fishhooks, 

 beads, tubes, masks, and engraved gorgets. Many were of pe;irl-like whiteness 

 and served as ornaments. Thirty-nine specimens of shell; thirty-one specimens 

 of bone and horn. 



