UNIVERSITY OF OKLAHOMA 

 BULLETIN 



PROCEEDINGS 



OF THE 



OKLAHOMA ACADEMY OF SCIENCE 



Affiliated wilh the 

 AMERICAN ASSOCIATION FOR THE ADVANCEMENT 

 OF SCIENCE 



1910-1920 



'Z. 



6 H- 



z- 



i"^ 



Issued Semi-Monthly By 



THE UNIVERSITY OF OKLAHOMA 



Norman, Oklahoma 



New Series No. 220 University Studies No. 14 



July 15, 1921 



