FEEDING EXPERIMENTS WITH ISOLATED FOOD SUBSTANCES. 



41 



Table XXIV. Summary of Data on Rat 24, fed for 169 Days on Pure Casein 



AS THE ONLY PROTEIN. DlET 4, PAGE 33- DAILY AVERAGES. 



Table XXV. Summary of Data on Rat 25, fed for 176 Days on Pure Casein 

 as the only Protein. Diet 4, Page 33- Daily Averages. 



Intake. 



Nitrogen output. 



Date of 

 experiment. 



Body- 

 weight. 



N-utilization. N-balance. 



Food. Nitrogen. L : rine. Faces. Total. 



1910 



Feb: 



Mar. 



Apr. 



May 



June 



July 



Aug. 

 Dead 



gm. gm. 



gm. 



gm. 



gm. 



p. ct. 



gm. 



0.252 

 0.207 

 0.245 

 0.238 

 0.21 

 0.2I0 

 o. 196 



o. 170 



o. 164 

 o . 1 76 



0.175 



o. 181 

 o. 176 



0.159 



0.034 

 0.033 



0.021 



0.033 



0.029 

 0.026 

 0.031 



0.204 



0.197 

 0.197 



0.208 

 0.210 

 0.202 

 o. 190 



87 



84 



9' 

 86 

 86 

 88 

 84 



+0.048 

 +0.010 

 +0.048 

 +0.030 

 0.000 

 +0.008 

 +0 . 006 



o. 161 

 o. 180 



0.185 



0.219 



0.181 



o. 160 



0.157 



o. 125 



0.095 



0.078 

 0.084 

 0.052 



o. 125 

 o . 1 26 



0.138 

 0.149 

 0.154 



o. 146 

 o. 124 

 o. 106 

 0.098 

 0.076 

 0.090 



0.086 



0.020 

 0.029 

 0.024 

 0.022 

 0.024 

 0.023 

 0.023 

 0.025 

 0.015 

 0.014 

 0.017 

 0.018 



0.145 



o. 155 

 o. 162 

 0.171 

 o. 178 

 o. 169 

 o. 147 

 o. 131 

 o. 1 13 

 0.090 

 o. 107 

 o. 104 



88 

 84 



87 



90 



86 



85 

 80 



84 

 82 

 80 

 65 



+0.016 

 +0.025 

 +0.023 

 +0.048 

 +0.003 



o . 009 

 +0.010 



o . 006 



0.018 



0.012 



0.023 



0.052 



