viii PLANT-BREEDING 



FIG. PAGE. 



17. The Laboratory of the Agricultural Experiment Station at 



Svalof, Sweden ... -57 



1 8. The Storage building of the Agricultural Experiment Station 



Svalof, Sweden ....... 59 



19. Svalof Concordia pea, a most productive erect new variety 



of green peas, produced at Svalof .... 69 



20. Svalof Pearl Summer wheat, not layering, early ripening, 



with full-rounded kernels, that keep in the ears at har- 

 vest time ...... -74 



21. Ordinary Butt Summer wheat, for comparison with the im- 



proved variety of the previous figure .... 75 

 22-26. Five different types of new varieties of oats, produced 



at Svalof. Fig. 22. Flag-oats . . . -76 



23. Stiff-branched Svalof oats . . 82 



24. Svalof oats with spreading branches .... 83 



25. Svalof oats with bending branches .... 86 



26. Svalof oats with weak branches . . . . .87 



27. A. Rye of Schlanstedt, produced by Wilhelm Rimpau by 



slow repeated selection. B. Ordinary rye . . . 97 



28. Determination of centgener power of the progeny of individ- 



ual wheat plants at the Agricultural Experiment Station 

 of Minnesota at St. Anthony Park. The progeny of each 

 parent plant packed in a sack for separate harvesting. 

 The Director, Mr. Hays in the first carriage, August, 1904 103 



29. Breeding block of corn which has been bred for high oil 



content on the farms of Funk Bros. Seed Co., Bloom- 

 ington, 111. ...... . 108 



30. Strength of individual stalks of corn on the breeding blocks 



of Funk Bros. Seed Co., Bloomington, 111. . . . 109 



31. Different types of corn. A. King Philipp, a variety of flint 



corn. B. Giant yellow dent corn. C. Rice popcorn. 



D. Dwarf popcorn . . . . . . . in 



32. A. Sweet corn, an ear with a staminate upper part and with 



some few kernels in top. B, C. Parts of a tassel of flint 

 corn bearing staminate spikelets and kernels . 113 



33. A highly ramified ear of corn 115 



34. A. A male or staminate spikelet of corn. B. A pair of pis- 



tillate or female flowers. After models of Brendel, Berlin 119 



35. A. Tassel of corn, flowering and producing the anthers from 



the spikelets. C. Ear in the husks, producing the silks 121 



36. Sweet corn, with scattered starchy kernels, produced by 



partial cross-pollination . . -123 



37. Method of sacking ear and tassel in corn for hybridizing, 



Agricultural Experiment Station, Manhattan, Kansas . 125 



38. The hand pollination of corn in one of the breeding blocks 



on the farms of Funk Bros. Seed Co., Bloomington, 111. 126 



39. Another view of hand pollination in breeding blocks of 



corn of Funk Bros. Seed Co., Bloomington, 111. . . 129 



