107 



the daily average of fat is concerned brewers' grains in mode- 

 rate quantities produce in the long run no appreciable diminu- 

 tion of fat. 



(5) Although the average daily yield of butter fat is not 

 appreciably affected by a moderate quantity of grains, the 

 percentage of butter fat in the morning's milk does seem to 

 be lowered more frequently. Having regard to this fact and 

 the 3 per cent, standard, where the mixed milk of a herd of 

 cows is habitually low in the morning brewers' grains are not 

 to be recommended. 



(6) It must also be borne in mind that the above conclu- 

 sions are based on results obtained by feeding brewers' grains 

 in moderate quantities only and with a good complement of 

 artificial foodstuffs. 



(7) In these experiments no effect was produced by the 

 brewers' grains on the non-fatty solids. 



(8) So far as the effect in the live-weight of the cattle is 

 concerned the results are in no way very marked. 



(9) With ordinary dairy cows, which are kept as breeding 

 stock, brewers' grains in moderate quantities may be safely 

 used as food when the stock are otherwise well fed. 



THE TRANSFER OF BORIC ACID FROM CATTLE 

 FOOD TO COWS MILK. 



BY S. H. COLLINS. 



It is more than ten years ago since Jay and Dupasquier 

 pointed out* that boric acid was present in many food 

 materials in small amount, but they did not find any boric 

 acid in milk, though more recently "Wiley found boric acid in 

 women's milk.f Also the writer has published a short note on 

 the subject in the Proceedings of the University of Durham 

 Philosophical Society, 1907-8, p. 33. 



* Comptes rendus, 1895, 260. 



f Journal of Biological Chemistry, 1907, p. 11. 



