HOLJIES] 



ABORIGINAL AMERICAN ANTIQUITIES PART I 



189 



verse section is very uniformly that of a flattened lens, which adapted 

 them especially to the chippino; operations of the aborigines. 



Fig. Go. Mauuri- of uei uii-om 



»1 iUv thiit cuiieix'tioDs in the limestone strata. 



The ancient pittings are found in several groups or clusters on the 

 hills and slopes in the vicinity of Mill Creek village, and the princi- 

 pal workings examined by Dr. Phillips are distributed along the 



Fig. 66. Examples of the liattish, irregularly shaped t'hert eoucret'ons used in blade 

 making. (One-sixth actual size.) 



crest of a ridge which rises to the west. At present, wdiere undis- 

 turbed, the old pittings are represented by bowl-shaped or oblong de- 

 pressions a few^ feet in depth and in few places exceeding 40 feet in 



