8o SCIENTIFIC FEEDING OF ANIMALS 



None of these experiments show that protein is 

 necessary for the formation of fat from carbo- 

 hydrates, and this has been repeatedly confirmed 

 in other experiments. It must not, however, be 

 concluded from this that the quantity of protein 

 in a feeding ration is not of importance, for it has 

 already been shown (p. 37) that the digestibility 

 of a food is depressed where there is not a certain 

 quantity of protein in it. It will also be seen 

 later that growing, fattening animals require fairly 

 large quantities of protein for the formation of 

 body tissue. 



In order to ascertain the quantity of fat which 

 can be formed from the various carbohydrates, 

 several investigations with oxen have been carried 

 out. The method adopted was to add the material 

 to be tested to a basal ration, the action of which 

 was determined either before or after the addition. 

 The results showed that body fat was stored in the 

 following quantities 



From i kg. digestible starch . . . 248 gr. fat 

 cane sugar . . . .188 gr. 

 crude fibre . . 253 gr. 



The crude fibre was given in pure finely divided 

 form (straw pulp of paper works), and it is seen 

 that in this condition it has about the same effect 

 as pure starch. In round numbers 57% of the 



