105 



The fluctuation in the average live-weight of the cows dur- 

 ing Experiment L is shown in Table XLV. 



At the end of the preliminary trials the cows in lot II., 

 were giving on an average 1 pint of milk per day more than 

 lot I. Assuming it is fair to suppose that the two lots would 

 have continued to milk in the same relation if they had been 

 fed on the same rations, lot II. during the ten weeks would 

 have given TO pints of milk more than lot I. As a matter of 

 fact, during the ten weeks of the Experiment K, while lot I. 

 received the grains the cows in lot II. only gave 49 pints more 

 in total than lot I. During Experiment L, however, when 

 lot II. received the grains the total increase of milk given by 

 lot II. over that of lot I. was 189 pints. 



The average loss in live-weight per cow in lot I. during the 

 period of 20 weeks was 16'21b., while that in lot II. for the 

 same period was 14 Ib. 



Summary and general conclusions, Below is a brief 

 summary of the results : 



PRELIMINARY TRIALS. 

 SET OF 10 COWS IN TWO LOTS OF 5. 



Lot I. 



Lot II. 



Milk per day 

 per cow. 



23-4 pints 

 23'6 pints 



of Fat in total 

 daily yield. 



3-33 

 3-40 



Average live-weight 

 per cow. 



1,050 Ib. 

 1,038-8 Ib. 



EXPERIMENT K. 

 10 Weeks, December 8, 1907 February 15, 1908. 



