47 



In making the calculations found in table XXXIV, it has been as- 

 sumed that the animals remained constant in weight throughout all of 

 the experiments. This however was not actually the case, as durino- 

 the English hay periods, the animals gained 147 pounds, while during 

 the salt hay period but 3 pounds increase were noted. If it were possi- 

 ble to calculate live weight into milk or milk ingredients, the above 

 figures would make a slightly more favorable showing for the Euo"- 

 lish hay periods. The facts brought out however are first, that 

 rather more dry matter was required to produce milk and butter fat 

 in the salt hay than in the English hay rations. The reason for this 

 is to be found in the lower digestibility of the salt hay. 



In the second place, it is to be noted that pound for pound of 

 digestible material, practically equal amounts of milk, etc. were 

 produced. 



TABLE XXXVI. 



AVater, 



Protein, 



Fat, 



Fiber, 



Extract matter, 



Asb, 



100.00 100.00 100.00 



100.00 



TABLE XXXVII. 



COEFFICIKNTS OF DIGESTIBILITY, 



* Composition of salt and English haj"^ "will be found under heading C. 



* * Used in Experiments IV and VI. 



