55 



ten cows being selected and divided into two lots of five each. 

 They were fed on a ration of 4 Ib. maize meal, 2 Ib. Bombay cotton- 

 cake, 3 Ib. chopped straw, and 1 2 Ib. hay ; Lot. I, received in ad- 

 dition 20 Ib. of brewers' grain and 20 Ib, swedes, while Lot II 

 received 60 Ib. swedes. Feeding in this way was continued for ten 

 weeks, when the rations were reversed that is, Lot I received 

 the increased quantity of swedes and Lot II the brewers' grains. 

 The variations in the results were not great, but the two series 

 of experiments are considered to point to the following conclusion : 



" i) A moderate allowance of 20 Ib. of brewers' grains per 

 day has the effect of increasing at all events for a certain period, 

 the daily yield of milk. The period over which such increase is 

 maintained has its limit, and the practice of changing the diet is 

 a good one. 



" 2) The effect of brewers' grains on the yield is not confined 

 to the earlier period of lactation, and it is probable that by a 

 judicious use of brewers' grains the lactation period might be con- 

 siderably extended. 



" 3) The evidence of the experiments with regard to the 

 percentage of fat in the milk seems conclusive that, so far as the 

 daily average of fat is concerned, brewers'grains in moderate quan- 

 tities produce in the long run no appreciable diminution of fat, 

 although the percentage of butter fat in the morning's milk seems 

 to be lowered more frequently. Having regard to this fact and 

 the 3 per cent standard, brewers' grains are not to be recommended 

 where the mixed milk of a herd of cows is habitually low in the 

 morning. It must also be borne in mind that the above conclusions 

 are based on results obtained by feeding brewers' grains in mo- 

 derate quantities only and with a good complement of artificial 

 foodstuffs. 



" In these experiments no effect was produced by the brewers' 

 grains on the non-fatty solids, nor was the effect on the live-weight 

 of the cattle very marked." 



Composition of Milk. [Journ. Bath and West and Southern 

 Counties Soc.]. Vol. III., 1908-909. Journal Board of Agric., 

 Dec. 1909. London, p. 756. 



" The object of these investigations, which were carried out by 

 the Somerset C. C., was to discover the composition of the milk 

 of a herd of ordinary cows kept under the ordinary conditions 



