82 Report of DEPARTMENT OF ANIMAL HUSBANDRY OF THE 
4. Distribution of outgoing phosphorus compounds in the milk 
and egesta.—The variations of the outgoing phosphorus are again 
found to occur almost wholly in the feces through a rise or fall of 
inorganic forms. This second experiment furnishes no evidence of 
changes in the distribution of other forms of phosphorus in the 
milk and egesta, due to variations in the quantities of phosphorus 
compounds in the ration. (See Tables 19-21.) 
5. Physiological effects due to variations in the phosphorus 
bodies of the two rations —There is a marked difference between 
this experiment and the first one in the extent, at least, of the 
physiological disturbances observed. The results are alike in that 
the amount of phosphorus excretion had no effect upon the storage 
or excretion of nitrogen. The results are unlike in the influence 
of changing rations upon the health of the animal and the con- 
dition of the feces. Nothing like constipation was observed, nor 
was there any marked change in the condition or color of the fecal 
discharge. . 
There was a perceptible, though not marked, variation in the 
volume of urine in the several periods, the change being in the 
reverse direction from that observed in the first experiment. In 
other words, the volume of urine was larger with the smaller 
phosphorus supply. The fact that the low phosphorus ration in 
this experiment carried the larger amount of digestible protein 
may in part account for this increase in the volume of urine. 
An examination of the figures shows that the volume of milk 
was somewhat larger during the low phosphorus period and that 
there was a small but perceptible lowering for a time, at least, 
of the percentage of fat in the milk. These changes are small, 
however, and not nearly as emphatic as was the case in the first 
experiment. (See Tables 22-24.) 
6. Effect of the two rations upon production—While the pro- 
duction of total milk solids, as well as of casein and fat, varied 
somewhat in the different periods, the data do not consistently show 
that these changes were due to the influence of the food. (See 
Table 24.) 
