ACKNOWLEDGMENTS 



In addition to individual acknowledgments made throughout 

 the volume, I wish to express my gratitude to those who have 

 aided in the work by many kindnesses in the way of advice and 

 suggestion, and by the furnishing of various data. My acknowl- 

 edgments are due primarily and chiefly to Professor W. G. 

 Sumner and Dr. J. Pease Norton to the former for that 

 general aid and counsel that can be offered only after wide 

 historical research, and for reading and criticising a large 

 tion of the work; to the latter for his indefatigable kindnes 

 giving continuous aid in obtaining material, and in giving 

 of a technical nature. Much assistance and encouragement ... 

 given by Mr. M. A. Carleton, Cerealist of the United Statip, 

 Department of Agriculture; by Mr. Wm. Saunders, Director of j 

 the Central Experimental Farm, Canada; and by Mr. W. M. 

 Hays, Assistant Secretary of Agriculture of the United States' 

 One of the most important of the several institutions which 

 are now expending considerable financial resources in economic 

 and industrial research is the Carnegie Institution of Wash- 

 ington, from which financial aid has been received in some of 

 the investigations necessitated by the preparation of this vol- 

 ume. Through the kind offices of Mr. P. B. Smith, President of 

 the Minneapolis Chamber of Commerce, material encouragement 

 has also been received from the St. Anthony and Dakota Ele- 

 vator Company and from the Washburn-Crosby Company. 



For carefully reading over the typewritten manuscript of the 

 book and suggesting many improvements in diction and phrase- 

 ology, I am indebted to my former pupil, Miss Elizabeth Hodg- 

 son. She is not to be held responsible, however, for any im- 

 perfections in language that may yet remain, inasmuch as I 

 made all final corrections and changes. [The Author. 



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