Principles and Practices Involved 
in the Breeding, Feeding, and Man¬ 
agement of Pure-Bred Draft Horses 
in the United States 
By 
VALENTE ESTRADA VILLEGAS 
)\ 
A Dissertation submitted to the Graduate Faculty of Iowa 
State College of Agriculture and Mechanic Arts in 
partial fulfillment of the requirements for 
the degree of Doctor of Philosophy 
No. 8 
Approved: H. H. Kildee, Head of Department 
R. E. Buchanan, Graduate Dean 
IRs^r 
AMES, IOWA 
NINETEEN TWENTY-THREE 
