COMPOSITION AND DIGESTIBLE NUTRIENTS 135 



Total digestible carbohydrates (76.475) -f- digestible protein 

 (7.8) = 9-8. 



Nutritive ratio in this case is i : 9.8. 



Table of Composition and Digestible Nutrients. The composi- 

 tion and digestible nutrients of feed stuffs are given in Table I. 

 The results in this table are the work of Foreign and American 

 investigators. 



Suggestion: Make the students determine the coefficients 

 of digestibility of several feeds. Assume some percentages of 

 digestibility for protein, fat and carbohydrates and have the 

 students work out the nutritive ratios. If a cow is fed 6 Ibs. of 

 corn and cob meal a day what per cent, of protein, fat, and carbo- 

 hydrates does it digest? 



