LIST OF ILLUSTRATIONS 



(Photographs, Diagrams and Tables) 



PAGE 



FIG. I. Main Building, Swedish Seed Association, Svalof Frontispiece 



Fio. II. Two mass-selected barley sorts 22 



FIG. III. Pedigree of Clay and Moss Barleys 23 



FIG. IV. Svalof s Selected (Renodlad) Squarehead wheat 26 



FIG. V. & VI. Types of panicles in Oats 32-33 



FIG. VII. Different classes of Spikelets 34 



FIG. VIII. Frequency curve of variation in weight of kernels 



from different pure cultures 47 



FIG. IX. Graphic explanation of the Law of Mendel 53 



FIG. X. Club wheat (T. Compactum) 66 



FIG. XI. Second generation (F 3 ) from the wheat crossing 



Club X Pudel 66 



FIG. XII. Svalof s Pudel wheat 66 



FIG. XIII. "False Wild oats" 71 



FIG. XIV. Removing impurities by hand from large culture of 



Elite Stock Seed grown at Svalof 85 



FIG. XV. Scheme showing general plan of procedure recom- 

 mended at Svalof in ordinary line-breeding work ... 88 

 FIG. XVI. A large comparative trial plot separated from its 



neighbor by Spring rye 89 



FIG. XVII. Sowing pedigree plots of wheat and rye at Svalof 90 



FIG. XVIII. Preliminary trial plots of Autumn wheat 91 



FIG. XIX. Dr. Nilsson-Ehle taking notes on preliminary trial plots . . 92 



FIG. XX. Sow r ing large comparative trial plots 94 



FIG. XXI. Harvesting pedigree plots 97 



FIG. XXII. View of experimental plots of Spring grains in 1910. . . 100 



FIG. XXIII. Method of grading strength of straw 105 



FIG. XXIV. Prof. Hjalmar Nilsson selecting oat plants for photo- 

 graphing 105 



FIG. XXV. Plot of Selected Squarehead wheat adjoining a 



pedigree out of the same 107 



FIG. XXVI. Dr. Nilsson-Ehle taking notes on the most promising 

 plot (5th generation) from the crossing Pudel X 



Swedish Velvet Chaff 110 



FIG. XXVII. Dr. Nilsson-Ehle examining segregation in the Club X 



Pudel wheat crossing Ill 



