ILLUSTRATIONS. 



PLATES. 



Page. 

 Plate I. Seeds of all varieties of soy beans, in natural sizes and colors. . Frontispiece. 

 II. Seeds and pods of the blark -seeded group .- 30 



III. Seeds and pods of the brown-seeded and mottled-seeded groups 30 



IV. Seeds and pods of the green-seeded and greenish-yellow-seeded 



groups 30 



V. Seeds and pods of the yellow-seeded group 30 



TEXT FIGURES. 



Fig. 1. Diagram showing the probable relationships of the different groups 



of soy beans 10 



2. Diagram showing for each variety of soy bean the number of days 



required to reach maturity and the height of the plant in inches. 13 



98 



6 



