Ill 
SOURCES OF MATERIALS 
In undertaking the work the writer made extensive trips and visited 
several leading breeding establishments of pure-bred draft horses of 
different breeds in Illinois, Iowa, and Wisconsin in the summer of 1920. 
Other data were secured through correspondence by means of question¬ 
naires sent to the principal draft horse breeding farms throughout the 
United States and several experiment stations. And besides, interviews 
were held with some breeders during the visits made to the county fair 
at Janesville, Wisconsin, the interstate fairs at Sioux City, Iowa, and at 
Kankakee, Illinois, the state fairs at Springfield, Illinois, and at Des 
Moines, Iowa, and lastly at the Belgian Horse Show, Waterloo, Iowa, 
all in the summer and fall of 1920. 
