ILL US TRA TIONS xiii 



FIGTTRE PAGE 



36. A head of spelt. (Livingston, Field Crop Production, The 



Macmillan Company) 179 



37. Heads of the principal types of sorghums. (Montgomery, The 



Corn Crops, The Macmillan Company) .... 180 



38. Seeds of the principal types of grain sorghums. (Montgomery, 



The Corn Crops, The Macmillan Company) . . . 181 



39. A panicle of rice. (Livingston, Field Crop Production, The 



Macmillan Company) 182 



40. Ten varieties of cowpeas. (Piper, Forage Plants, The Mac- 



millan Company) .183 



41. Ten varieties of soybeans. (Piper, Forage Plants, The Mac- 



millan Company) 184 



42. Pods of cowpeas and soybeans. (Livingston, Field Crop Pro- 



duction, The Macmillan Company) 184 



43. Root of peanut. (Livingston, Field Crop Production, The Mac- 



millan Company) 185 



44. A cotton plant. (Livingston, Field Crop Production, The Mac- 



millan Company) 186 



45. Structure of the corn kernel. (Illinois Experiment Station) . 189 



46. Section of wheat kernel. (Jordan, The Feeding of Animals, 



The Macmillan Company) 194 



47. Weeds growing from seed found in a commercial feed con- 



taining screenings. (Vermont Experiment Station) . . 200 



48. Buckwheat in bloom. (Livingston, Field Crop Production, The 



Macmillan Company) 204 



49. Distribution of hay and forage in the United States. (United 



States Census, 1910) 233 



50. Red clover. (Livingston, Field Crop Production, The Mac- 



millan Company) 234 



51. Production of clover in the United States. (Hitchcock, A Text- 



book of Grasses, The Macmillan Company) . . . 235 



52. An alfalfa plant. (Livingston, Field Crop Production, The Mac- 



millan Company) 237 



53. Distribution of alfalfa in the United States. (United States 



Census, 1910) 238 



54. Arrangements of leaflets of alfalfa and clover. (Livingston, 



Field Crop Production, The Macmillan Company) . . 239 

 65. Alsike clover. (Livingston, Field Crop Production, The Mac- 

 millan Company) 241 



