LIST OF ILLUSTRATIONS Xlll 



Fig. Page 



97 Radishes Bunched for Market 418 



98 A Field of Rhubarb 420 



99 Boston Marrow Squash 427 



100 Some of the Commercial Types of Sweet Potatoes 436 



101 Frame for Growing Sweet Potato Plants 441 



102 Cross-Section of Pipe-Heated Frame 443 



103 Sweet Potato Sets or Drawings 446 



104 Plows for Harvesting Sweet Potatoes 447 



105 Harvesting Thyme 449 



106 Pot-Grown Tomato Plant 456 



107 Tomatoes Packed for Market 464 



108-110 Student Gardens at the Pennsylvania State College 499,501,503 



