116 Repokt of Department of Animal Industry of the 



The tendency of the ash is to follow the milk solids. The several 



components of the ash mentioned in the table may be considered 



as constant, with the exception of potassium, which seems to decrease 



slightly throughout the experiment. On the 79th day, whole bran 



was introduced into the ration, and according to the data in the 



previous periods, one would expect a decrease in the milk flow and 



milk sohds. The volume of milk had been decreasing throughout 



the long preceding period and no marked change was noted in the 



milk flow which could be ascribed to the whole bran; the solids, 



however, increased on the 82d day. This is obviously a different 



matter from the former fluctuations in the milk solids, and may be 



likened to the phenomena commonly observed at the end of a period 



of lactation. The analytical data for this period are as follows: 



Number of day 77 78 79 80 81 82 83 84 



Percentage of fat 3.25 3.35 3.25 3.2 3.6 3.8 4.4 4.7 



Percentage of fat-free solids. 9.0 8.80 9.10 8.9 8.8 9.0 9.2 9.5 



The percentages of total and casein nitrogen show very small 

 but gradually decreasing values throughout the five periods, which 

 is in contrast to the three former experiments of this series in which 

 a small but gradual increase is indicated. These authors stated 

 that aside from the change in the fat content there was no influence 



Table IX. — Average per Day of the Ash Constituents in the Milk. 



