Vi PREFACE 



from the less successful, and find to which of the differences 

 the success is due. After such principles are found, they 

 need to be tested by use in reorganizing farms. 



The conclusions in this book are based on investigations 

 of the kind given above, and on cost accounts, census data, 

 travel and study in different parts of the United States and 

 experience in farming. It is hoped that the conclusions 

 may be of use to farmers and students. 



In preparing the book the writer has received much aid 

 from K. C. Livermore, who helped in working out some of 

 the data and read all the manuscript, and with whom many 

 of the points have been discussed. Acknowledgment is also 

 due to A. L. Thompson and C. E. Ladd for reading the 

 manuscript and making many helpful suggestions. 



The Figures 2, 54, 55, and 56 were secured from the 

 Minnesota Agricultural Experiment Station. Figures 8, 70, 

 and 71 were furnished by the Office of Farm Management, 

 United States Department of Agriculture. Figures 51 and 

 107 were furnished by F. E. Dean of Grand Junction, Colo- 

 rado. \V. 0. Strong, Grove, Virginia, furnished" Figure 69. 

 Several figures were furnished by the New York State 

 College of Agriculture. 



G. F. WARREN. 



ITHACA, NEW YORK, 

 February 22, 1913. 



