82 



Rations. The same plan was followed in the general 

 arrangement of the experiment as in previous experiments,, 

 viz., the cows were fed on certain rations for a period, after 

 which the rations were reversed, and the experiment continued 

 for a similar period under the altered conditions. In the 

 present case, the rations used were as follow per 1,000 Ib. 

 live-weight : 



LOT I. 



4 Ib. maize meal. 



2 ,, Bombay cotton cake. 



3 ,, chopped straw. 

 12 hay. 



6C , , swedes. 



LOT II. 



4 Ib. maize meal. 



2 ,, Bombay cotton cake 



3 ,, chopped straw. 

 12 hay. 



20 , , brewers' grains. 

 20 ,, swedes. 



The cows were fed as above for eight weeks. There was 

 practically the same amount of organic matter in each ration, 

 but that given to lot II. was more nitrogenous than the other. 

 The difference, however, was not great, and it probably varied 

 a little from time to time, owing to the variation in the com- 

 position of the brewers' grains. 



As before, the cake and meal and chopped straw were made 

 into " crowdy " before being served to the cows, and water 

 was supplied ad lib. 



Results. As usual, the yield of milk, the percentage of 

 fat, and of " solids not fat," are tabulated separately, the 

 figures given in the tables being the weekly averages. Table 

 XXX. shows the quantity of milk produced by the two lots in 

 Experiment I. 



The results as regards the yield were clearly in favour of 

 the brewers' grains throughout, lot II. giving, on the average, 

 nearly 14 pints more milk per day than lot I. The difference 

 in the relative yield of the two lots was more marked towards 

 the end of the experiment than it was in the beginning, lot 

 II. keeping up its yield much better than lot I. It will be 

 seen on comparing the results with the preliminary trials that 

 both lots had gone off their milk by the beginning of the 



