XU ILL US TRA TIONS 



FIGrBE PAG« 



16. The ration of these pigs was deficient in the amount and quality 



of protein. (Illinois Experiment Station) .... 83 



17. The ration of these pigs contained sufficient protein of the proper 



quality. (Illinois Experiment Station) .... 84 



18. The effect of the amount and kind of protein upon the bones 



of growing pigs. (Illinois Experiment Station) . . . 85 



19. Pigs at the beginning of a 196-day feeding period upon corn 



alone. (Kentucky Experiment Station) .... 86 



20. The same pigs as shown in Figure 19 after 196 days of feeding 



corn alone. (Kentucky Experiment Station) ... 87 



21. Section of bomb calorimeter. (Connecticut (Storrs) Experiment 



Station) 94 



22. Respiration calorimeter at the Institute for Animal Nutrition, 



State College, Pa. (H. P. Armsby, Pennsylvania Experi- 

 ment Station) 96 



23. Cross-sections of haystacks of different shapes showing the 



corresponding values f or ' * F. " ( United States Department 



of Agriculture) 117 



24. A self-feeder for cattle. (Mumford, Beef Production) . . 153 



25. A self-feeder for hogs. (Illinois Experiment Station) . . 154 



26. Corn production in the United States. (United States Census) 158 



27. An ear of dent com. (Livingston, Field Crop Production, The 



Macmillan Company) 160 



28. Cross-section of a kernel of dent corn. (Livingston, Field Crop 



Production, The Macmillan Company) .... 160 



29. An ear of flint corn. (Livingston, Field Crop Production, The 



Macmillan Company) 161 



30. Cross-section of a kernel of flint corn. (Livingston, Field Crop 



Production, The Macmillan Company) .... 161 



31. Distribution of oat production in the United States. (United 



States Census, 1910) 170 



32. Ergot in a head of rye. (Duggar, Southern Field Crops, The 



Macmillan Company) 175 



33. A head of barley. (Living.ston, Field Crop Production. The 



Macmillan Company) 176 



34. Distribution of barley production in the United States. (United 



States Census, 1910) 177 



35. A head of emmer. (Livingston, Field Crop Production, The 



Macmillan Company) 178 



