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EXPERIMENT L. 

 10 Weeks, February 16 April 27. 1908. 



The two experiments had for their object to discover the 

 effect of brewers' grains upon the quantity and quality of milk. 

 A similar set of experiments was reported on in Offerton 

 Bulletin No. 2. A set of ten cows which had undergone a 

 preliminary trial was under experiment for twenty weeks. 

 The cows selected had satisfactorily passed the tuberculin 

 test. They were divided into two lots of five, and each 

 lot was placed in turn on a ration containing 20 Ib. of ordinary 

 brewers' grains and fed on this ration for ten weeks. It 

 should be noted that the cows experimented upon were kept 

 for breeding. On the whole it may be said that the two latter 

 experiments are confirmatory in their results of the two pre- 

 vious experiments and the following conclusions are based on 

 the results of the series : 



(1) 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 (Tables XXXVIII. and XLIL). 



(2) It would seem from a study of the above tables that 

 the period over which such increase is maintained has its 

 limit, and that the practise of exercising a change of diet is 

 a good one. 



(3) The effect of brewers' grains in the yield is not confined 

 to the earlier period of lactation. By a judicious use of 

 brewers' grains such lactation period might be considerably 

 extended. 



(4) The evidence of the experiments with regard to the 

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



