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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 inde- 
pendently. 
Entered as second-class matter, June 14, 1918, at the post-office at Bloomington, Ind., 
under the act of August 24, 1912. The Indiana University Studies are published four 
times a year, in March, June, September, and December, by Indiana University, from 
the University Office, Bloomington, Ind. 
5 
