28 



FEEDING EXPERIMENTS WITH ISOLATED FOOD SUBSTANCES. 



Table X. Summary of Data on Rat 11 fed on Dog Biscuit-Lard Diet for 84 

 Days and then on Milk Powder-Starch-Lard Diet for 94 Days. Daily 

 Averages. 



Period i. 



Intake. 



Date of 

 experiment. 



Body- 

 weight. 



Nitrogen output. 



N-utilization. N-balance. 



Food. Nitrogen. Urine. Fa?ces. Total. 



1910. 



Jan. 24. 



31 

 Feb. 7. 



gm. gm. 



2243 



213.7 6.4 



208.8 7.3 



gm. 



gm. 



o. 101 

 o. 1 16 



gm. 

 0.018 



gm. 



p. ct. 



0.107 0.010 0.125 

 o. 1 16 0.020 o. 136 



Period 2. 



1910 

 Feb 



Mar. 



Apr. 



/ 

 5 

 .0 

 .0 



3 

 . 1 

 .0 



.2 



6.3 



7-4 

 6.4 

 6.9 

 5 3 

 5-1 

 6.3 

 6.6 



o. 120 

 o. 142 

 o. 123 

 0.131 

 o. 100 

 o. 100 

 o. 123 

 o. 129 



o. 1 15 

 o. 126 



O. 120 

 O. I 10 



o. 102 



82 



83 



gm. 



o . 024 

 0.020 



Period 3. 



188.0 

 194.6 



'93 5 

 94-3 

 200.0 

 192.2 



.83.5 

 172.1 

 191.5 

 190.2 



188.5 

 187.0 



183.7 

 54 5 



7-i 

 7.0 



7-3 



6.8 



6.9 

 5' 

 5-9 

 4i 

 7-3 

 5.8 

 6.1 

 5.8 

 6.2 



0.179 

 o. 176 

 0.182 

 o. 170 



174 



129 



15' 

 105 

 0.183 

 o. 146 

 0.153 

 0.145 

 0.155 



94 

 87 

 84 

 88 

 88 

 90 

 86 

 82 

 89 

 85 

 84 

 80 

 82 



+0.072 

 +0.033 

 +0.020 

 +0.012 

 +0.023 



o . 002 

 0.017 

 -0.073 

 +0.015 

 +0.022 

 +0.002 



o . 02 5 

 +0.004 



