Why Digestibility Varies 125 



fats aud oils are quite completely emulsified and ab- 

 sorbed. 



The foregoing statements make it plain that when 

 the general composition of a feeding stuff is known it 

 is possible to predict with a good degree of certainty 

 whether its rate of digestibility is high or low. The 

 larger the proportion of starch and sugar and the smaller 

 the percentage of gums and fiber, the more complete 

 will be the solution. We see this illustrated in the ex- 

 treme by the difference in digestibility of corn meal and 

 of wheat straw. 



