PARALLELISM OF THE SOILS DEVELOPED ON 

 THE GRAY DRIFTS OF MINNESOTA 



A THESIS SUBMITTED TO THE FACULTY OF THE GRADUATE 

 SCHOOL OF THE UNIVERSITY OF MINNESOTA 



BY 



CLAYTON ORD, HOST, B. Sc , M. A. i ' 



IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE 

 DEGREE OF DOCTOR OF PHILOSOPHY 



JUNE 1918 



