70 



The " solids not fat " were on the average throughout the 

 experiment somewhat low, and the number of times during the 

 twelve weeks the milk was under the standard of 8'5 per 

 cent, is truly remarkable. In the case of lot I., for example, 

 taking individual milkings and not weekly averages, the milk 

 was, as shown in the table, under the standard on TT occasions 

 out of 252, which is equal to 30 per cent. It should be 

 observed that this was the lot which received the extra food. 

 Lot II. was slightly better. As a general rule in all previous 

 experiments, the " solids not fat " have been well above the 

 standard on the weekly averages, while in the present case 

 they were frequently below. 



Live-weight of the cows. The cows were weighed at 

 the commencement of the experiment, and at the end of each 

 period of six weeks. 



TABLE XXV. AVERAGE LIVE-WEIGHT (IN LB.) PER COW 

 OF EACH LOT. 



Gain or Loss 



Commencement. August 1. September 13. over whole 



period. 



Lot I. ... 1,134 ... 1,141 ... 1,162 + 28 



Lot II. ... 1,103 ... 1,092 ... 1,092 - 11 



The concentrated food caused only a small increase in the 

 average live-weight of the cows in lot I., the increase being 

 greatest in the second period, when the double quantity of cake 

 and meal was supplied. The comparatively small loss in the 

 case of lot II. took place during the first half of the experi- 

 ment. During the second half, three out of the five cows 

 actually gained weight, and the loss in the average weight is 

 entirely due to one cow, No. 93. Similarly, the gain in the 

 average weight in lot I. is also due to one cow, No. 91. If 

 these two cows were left out of the calculation, there would 

 have been very little difference in the average live-weight of 

 the two lots at the end. But, even taking the figures as they 

 appear in the table, there is not much to be said in favour of 

 the concentrated food, for a gain of 28 Ib. live- weight per 



