Contents xiii 



CHAPTER XII 



PAGES 



PHYSIOLOGICAL VALUES OF THE NUTRIENTS 170-181 



Relative energy and production values of the nutrients, 



singly and as classes . 171 



Relative energy values 171 



Relative production values of the different nutrients . 175 

 Relative importance of the protein compounds .... 178 



CHAPTER XIII 

 LAWS OF NUTRITION 182-185 



CHAPTER XIV 



SOURCES OF KNOWLEDGE 186-202 



Conclusions of practice 187 



Practical feeding experiments 188 



Chemical and physiological studies 191 



More accurate methods of investigation 192 



Relation of food to production 194 



The respiration apparatus v . 196 



Determination of energy values 198 



Calculation of energy value of a ration 198 



Energy value of digested nutrients 199 



Measurement of food combustion 200 



Respiration calorimeter 201 



PART II 



THE PRACTICE OF FEEDING 



CHAPTER XV 



CATTLE FOODS NATURAL PRODUCTS 203-226 



Forage crops 204 



Green vs. dried fodders 205 



The harvesting of forage crops 207 



