XIV Journal of Agricultural Research voi. xix 



Page 



4. Graph showing lateral and dorsoventral diameters of the ovary tip as com- 



pared with length, lateral diameter, and dorsoventral diameter of the 

 kernel for the 26 days following flowering in 1916 408 



5. Graph showing average length of kernels 6, 7, and 8 (solid line), average 



lateral diameter (dotted line), and average dorsoventral diameter (broken 

 line) from plot i in 1917 410 



6. Graph showing average length of barley kernels, including ov,af y tip, from 



flowering to near maximum development in plot i in 1917 411 



7. Graph showing average lateral diameter of barley kernels from flowering 



until near maximum development, plot i, 1917 41a 



8. Graph sliowing dorsoventral diameters of barley kernels from, flowering 



until near maximum development 413 



9. Graph showing wet weight of individual kernels 5, 8, and 10, by days, from 



date of flowering to near maturity in 1917 418 



10. Graph showing average wet weights of kernels from flowering to mattu-ity in 



plot I in 1917 419 



1 1 . Graph showing dry matter per kernel from date of flowering to near maturity 



in 1916 (dotted line) and in 1917 (solid line) 420 



12. Graph showing dry matter per kernel at 12-houx intervals from flowering to 



matiurity 42 1 



13. Graph showing dry- weight gain of kernels 6, 7, and 8 in 12-hour periods. . 422 



14. Graph showing percentage of moisture in morning and evening samples of 



Hannchen barley in 1917 42a 



15. Graph showing nitrogen per kernel from date of flowering La 1916 (broken 



line) and in 1917 (solid line) 424 



16. Graph showing ash per kernel from date of flowering in 1916 (broken line) 



and in 1917 (solid line) and the percentage of ash in 1917 (dotted line). . 426 



17. Periods of development of the barley kernel as indicated by records during 



three years at Aberdeen, Idaho 427 



Plates 



83. A. — Fertilized ovary. B. — Kernel i day old. C. — Kernel 2 days old. 



D. — Kernel 3 days old 430 



84. A. — Kernel 4 days old. B. — Kernel 5 days old. C. — Kernel 6 days old. 



D. — Kernel at later stage of development 430 



85. Kernel 5 days after fertilization 430 



86. Kernel 6 days after fertilization 430 



87. Kernel 9 days after fertilization 430 



88. Kernel 14 days after flowering 430 



8g. Kernel 20 days after fertilization, at which time growth was nearly com- 

 pleted 430 



90. Kernel 25 days after fertilization, growth completed 430 



91. Section of a nearly mature kernel, showing cells next the furrow 430 



Development op Barley Kernels in Normal and Clipped Spikes and 

 THE Limitations of Awnless and Hood&d Varieties 



Text Figures 



I. Graph showing growth in length, lateral diameter, and dorsoventral diameter 



of kernels of Manchuria barley in normal and clipped spikes 448 



2. Graph showing wet weight of kernels of Manchuria barley from normal and 



clipped spikes 449 



