The Indiana University Studies are intended to furnish a means 

 for publishing some of the contributions to knowledge made by instructors 

 and advanced students of the University. The Studies are continuously 

 numbered; each number is paged independently. 



Entered as second class matter, March 27, 1916, at the post-ofiQce at Bloomington, 

 Ind., under the Act of August 24, 1912. The Indiana Univebsitt Studies are pub- 

 lished six times a year, in January, March, May, July, September, and November, by 

 Indiana University, from the University Ofllce, Bloomington, Ind. 



