PREFACE Vll 



defect. Neither the substance nor the form of the practicums 

 here proposed is vital. The Instructor can modify them to suit 

 his needs or plan others along similar lines. Here again the 

 author has included more than any single course would probably 

 offer, in order that the Instructor may choose such as he re- 

 quires or as his facilities may permit. The author is aware that 

 the success of his attempt to put this subject into pedagodic 

 form is far from perfect. He will, therefore, be grateful to In- 

 structors in Agronomy if they will submit to him any criticisms 

 or suggestions that may occur to them either as to subject 

 matter or method of treatment 



THOMAS F. HUNT. 



Cornell University, 

 Ithaca, N. Y., October i, 1904. 



