DENISON UNIVERSITY 
BULLETIN 
Volume XXII, No, 5 
Journal 
OF THE 
Scientific Laboratories 
Volume XX Articles 1-3 Pages 1 to 36 
1. A Review of the Biology of Sex-determination. By Sidney I. 
Kornhauser 1 
2. The Meander Patterns of Rios Secure and Mamore, Eastern Bolivia. 
By Kirtley F. Mather . 22 
3. Primitive Musical Instrum*ents of the Denison Collection. By Karl 
H. Eschman 28 
GRANVILLE, OHIO 
NOVEMBER, 1922 
The University Bulletin is issued bi-monthly and is entered at the 
Post Office in Granville, Ohio, as mail matter of the Second Class 
