ILLUSTRATIONS 



FIG. PAGE 



Intensive Fruit Growing in a Western Irrigated Section. . . Frontispiece 



1. Germinating Oats and Barley 2 



2. A Seedling Maple Tree 4 



3. A Self-balanced Aquarium 



4. A Section of Green Leaf Under Microscope 7 



5. Osmosis with a Bladder Membrane 9 



6. The Poppy Flower 13 



7. Ear of Corn in Full Silk 



8. Cross-section of Head of Wild Sunflower 15 



9. Ear of Corn from Isolated Corn Stalks 16 



10. Violet Showing Cleistogamic Flowers 17 



11. Larkspur Flowers 18 



12. The Honey Bee 19 



13. The Pistil of the Peanut Blossom 19 



14. Base of Peanut Plant 19 



15. Tobacco Flowers and Seed 20 



16. Seedling Carnations Showing Slight Variation 23 



17. Vegetable Trial Grounds 25 



18. Breeding Plants to Resist Root Disease 



19. The Modern Chrysanthemum 27 



20. Methods of Emasculation of Tobacco Flowers 28 



21. Methods of Wheat Breeding 29 



22. Tobacco Field Showing Bagged Plants 30 



23. Strong and Weak Tuber Units 35 



24. Potato Harvest ' 



25. Wheat Breeding in Minnesota 36 



26. Methods of Breeding Wheat - 36 



27. Wheat Crossed with Pollen from Rye 37 



28. Variable Types of Johnson County Corn 38 



29. Prize Winning White Dent Corn 



30. Variation in the Apex of Heads of Timothy 



31. Variation in Thickness of Heads of Timothy 40 



32. Variation in Length of Heads of Timothy 41 



33. Potato Seed Cases 42 



34. Potato Seedlings 



35. Potato Seedlings Showing Variations 42 



36. Lens 



37. Preserving Seed Samples 45 



38. Student's Collection of Seeds 



39. School Set of Economic Seeds 



40. An Inexpensive Fanning Mill 46 



41. Map Showing Sources of Vegetable and Flower Seeds in United States 51 



42. Chief Districts for Grass and Forage Seeds 52 



43. A Single Sweet Potato Showing Sprouts 55 



44. A Field of Young Bulbs 57 



45. Mother Hyacinth Bulbs 57 



46. An Excellent Crop of Young Bulblets 



47. Tip Layering 59 



xi 



