iior-MEs] 



ABORIGINAL AMERICAN ANTIQUITIES PART I 



293 



A remarkable illustration of the vicissitudes of fracture was 

 brought to light by Dr. rhi]li[)s while carrying on explorations 



Fig. 101. Example of failure 

 in blaJe making due to mal- 

 formation. 



Fig. 152. Example of cro.ss frac- 

 ture under the hammer near the 

 completion of a blade. 



along the southwest shore of Lake Michigan. By patient search he 

 collected, in addition to one-half of an incipient blade, upward of a 



Fig. 1.53. Cross-fractured blade, one-half of which was found, and also a dozen of the 

 flakes struck from it with the hammer. Flakes set 1)ack into place. Each flake rep- 

 resents a blow. 



dozen of the flakes removed fi-oin it by the haininerstone before the 

 fatal stroke occurred (fig. ir)3). , 



