396 



Journal of Agricultural Research voi. xviii, No. ^ 



The aim was to supply a sufficient amount of ash to eacH ration to meet 

 all mineral requirements and so have but one variable protein running 

 through the whole series of rations. The addition of ash to the rations 

 containing meat scraps was probably unnecessary, but in order to secure 

 uniformity the same amount was added to all. 



Table III gives the percentage of nitrogen and ash in the feces at 

 different periods of the experiment. 



Tabi<E 111.— Distribution of feces nitrogen and ash at different periods 

 BASAL RATIO PLUS MEAT SCRAPS 



BASAL RATIO PLt S SOYBEAN MEAL 



BASAL RATIO PLUS COMBINATION OF MEAT SCRAPS AND SOYBEAN MEAL 



BASAL RATIO ONLY 



13- 



2. 24 



o Average total nitrogen is the average for the 4-, 8-, 16-, and 20-week periods. 



