Nitrogen Metabolism Experiments. 



295 



to estimate as nearly as possible the quantity of fecal nitrogen excreted each 

 day in order to compute the daily gains or losses of nitrogen to the body. 

 Separation of the feces was made each week. In the computations of the 

 amount of daily fecal nitrogen recorded in table 181 it is assumed that the 



Table 181. Calculated daily excretion of fecal nitrogen Nitrogen metabolism 



experiments Nos. 1 and 2. 



fecal nitrogen was proportional to the nitrogen ingested each day. The total 

 nitrogen ingested each week was taken as 100 per cent and the proportion of 

 this amount ingested each day calculated. These values are recorded in the first 

 column of the table. The total nitrogen of the feces for the week was then 



