28 THE ROYAL SOCIETY OF CANADA 



Average Composition of Bran and Shorts. 



Comparing the series of 1903 with that of 1917, the dififerences 

 in composition are not on the whole such as to call for extended 

 comment, though the somewhat higher protein content of the bran and 

 the decidedly higher percentage of fibre in the shorts, appear to be 

 significant of certain milling changes that had taken place during the 

 thirteen year period. 



The data for the 1918 (new regulations) series, compared with 

 those of the bran and shorts previously manufactured, permit the 

 following deductions. 



1. That the bran milled under the 1918 regulations is approxi- 

 mately -75% richer in protein, -5 per cent richer in fat and contains 

 1-5% more fibre. 



2. That the shorts milled under the 1918 regulations are approxi- 

 mately 1-75% richer in protein and contain about 2-5% more fibre. 



No digestion experiments have as yet been made with the new 

 bran and shorts and therefore no data can be given as to their exact 

 nutritive value compared with those products of pre-regulation times, 

 but it seems very probable, as far as cattle are concerned, that the 

 differences will be slight. The somewhat higher protein content 

 may be largely offset by the larger percentage of fibre. In the case 

 of young pigs and calves, however, we may fairly conclude that the 

 "regulation" shorts, owing to their more fibrous character, will not 

 be so nutritious or suitable. 



An interesting feature revealed by this study is the fact that the 

 samples of bran and shorts of the 1918 series show less variation in 

 composition than those of the two preceding series. This will be 

 apparent from the following table: 



