VUl PREFACE 



Hall, who has had charge of the proof reading; to Zeese- Wilkinson Com- 

 pany, New York City, who have had an especially dififictilt task in making 

 the color-plates and who have done the work well; and to the J. B. Lyon 

 Company, Albany, New York, for their painstaking work in printing the 

 book. 



U. P. HEDRICK, 

 Horticulturist, New York Agricultural Experiment Station. 



