FEEDING EXPERIMENTS WITH ISOLATED FOOD SUBSTANCES. 



45 



Table XXVI. Summary of Data on Rat 16, fed for 210 Days on Mixtures Con- 

 taining Casein and Excelsin as the Only Proteins. Daily Averages. Cont'd. 



Period 4, 14 Days. Casein 6 per cent, Excelsin 12 per cent. 



Intake. 



Date of 

 exp<_riment. 



1 9 1 O. 



May 16. 



23- 



1910. 

 May 30 

 June 



July 



Aug. 



Sept. 



Dead 



Body- 

 weight. 



Nitrogen output. 



N-utiJization. 



Food. Nitro-ien. Urine. Faeces. Total. 



gm. 

 232. 1 



233-5 



gm. 



7-5 



7-2 



gm. 

 0.210 

 0.201 



gm. 

 o. 167 

 0.177 



gm. 



0.028 

 0.020 



gm. 

 0.195 

 0.197 



p. a. 



87 

 90 



Period 5, 119 Days. Excelsin 18 per cent. 



235.6 



235.0 

 231.8 



228 



218 



216 



216 



220 



207 



214 



220 



212.7 



219.4 



216.3 



209.5 



197.0 



160 .3 



165 

 192 

 192 



'73 



141 

 150 



155 

 158 

 181 



'59 

 141 

 196 

 170 



'59 

 212 

 229 

 223 



0.024 

 0.020 

 0.022 

 0.026 

 0.01 5 

 0.025 

 0.020 

 0.025 

 0.027 

 0.017 

 0.016 

 0.025 

 0.020 

 0.025 

 0.037 

 0.022 

 0.039 



o. 189 

 0.212 

 0.214 

 o. 199 

 o. 156 



0.175 

 0.175 

 0.183 



0.208 

 o. 176 



0.157 



0.221 

 o. 190 

 o. 184 

 o . 249 

 0.251 

 0.262 



89 



92 

 90 



88 

 89 

 88 

 89 

 89 

 86 

 92 



93 

 90 



92 

 90 



86 

 9' 



78 



N-balance. 



gm. 

 +0.015 

 +0.004 



+0.024 

 +0.026 

 0.003 

 +0.016 



0.017 

 +0.042 

 +0.01 1 

 +0.042 



0.015 

 +0.038 

 +0.074 

 +0.021 

 +0.054 

 +0.068 

 +0.013 



0.017 



0.082 



dead 



100 120 wo 



Days 



180 200 220 240 



Chart XVII. Rat 16 fed 210 days on Casein and Excelsin as the only proteins. See p. 44. 

 Numbers on Body-weight line indicate time at which each period began. 



