AUTHOR'S PREFACE 



This work has been written in the hope of meet- 

 ing a long- felt want. It has been the aim of the 

 writer to adapt it to the needs of the farmer, the 

 stockman and the agricultural student. It is left 

 with the agriculturists of this country to say how far 

 these objects have been attained. 



University Experiment Farm, 

 St. Anthony Park, Minn., 1900. 



