118 Percentage Composition of Milk 



B. The Influence of Diet on the Volume and Percentage 



Composition ok tiik Mii.k. 



Experiment V. (Analytical Data, Table V.) 



The above prin(i])le haviiii: been established on a diet of constant 

 composition, it was desired to see to wliat extent it niiyht be departed 

 from on diets which were abnormally hi<ih in some one of tlie three 

 enerjjy-yielding constituents of the food, viz., protein, fat and carbo- 

 hydrate. 



Table V. 



(Average daily volume and average percentage com])osition of the 

 milk for each dietary period.) 



(In ciilculatiug the average percentage of protein the iioii-proteiii 

 nitrogen was not included.) 



To do this the normal calorific intake of the goat was first estimated 

 by feeding her for 20 days on an unlimited and congenial diet of known 

 composition, weighing the amount of food left over at the end of each 

 day, and finally calculating the average daily calorific consumption. On 

 this basis each of the experimental diets was made up. 



In this experiment, a high fat, a high ])rotein and a high carbohydrate 

 diet were given, a period of normal diet intervening between each period 

 of special diet. The average daily volume of the milk has been worked 

 out for each dietary period, and against this has been set out the average 

 percentage composition of the milk for the corresponding period. The 

 first two days after each change of diet have, however, been omitted 

 in the calculation of these averages. For reasons of space the results of 

 the individual milk analyses from day to day have not been given in 

 the tables, hut only the average daily volume and average percentage 

 composition for each dietary period. (For details of diets, see Table VI.) 



