ACKNOWLEDGMENTS 



The author desires to acknowledge the valuable assistance of 

 Mr. Rufus W. Stimson, editor of the series of which Vegetable 

 Growing Projects is to be a part. We are indebted to him for 

 suggesting the particular form used in the preparation of the manu- 

 script. The author is also grateful, to Prof. John R. Bechtel, in 

 charge of vegetable growing instruction at The Pennsylvania State 

 College, who read all the manuscript and who directed the making 

 of most of the illustrations, which were obtained from the Depart- 

 ment of Horticulture ; to Prof. Raymond G. Bressler, of The Penn- 

 sylvania State College, who also read the entire manuscript; to 

 Prof. E. L. Nixon of The Pennsylvania State College, who provided 

 illustrations No. 55, 56, and 57 and made many valuable sugges- 

 tions relating to the control of disease and insect enemies of the po- 

 tato; to Dr. Frank D. Kern of The Pennsylvania State College for 

 all botanical notes ; to Prof. H. E. Hodgkiss of The Pennsylvania 

 State College for all notes relating to injurious insects; and to 

 ]\Ir. Harvey Porch of Bridgeton, N. J., for the photograph from 

 which was made the illustration on page 36. My son, Gilbert S. 

 Watts, rendered valuable assistance in the preparation of the 

 " Calendar." 



R. L. Watts. 



September 24, 1921. 



