23,1 Santos: Metabolism Experiments with Filipi't 



57 



12). This is due to the greater comparative nitrogen intake 

 of the subjects investigated, in conformity with the well-known 

 fact that, within certain limits, the nitrogen metabolism can be 

 maintained at different levels. 



The acidity is lower than that of the average urines of 

 Europeans or Americans, but higher than that of the urines 

 of the people of Singapore (Campbell, 5). 



Table 13 shows the day and night variations in some of the 

 constituents of the urine of F.O.S. 



SUMMARY 



Filipinos who had become accustomed to American food 

 showed positive nitrogen balances when given their native diet, 

 and this diet as selected furnished enough calories for the nutri- 

 tive equilibrium. 



The results obtained were compared with previous work done 

 in the Philippines. 



Analyses of urines for some of the constituents are recorded. 



ACKNOWLEDGMENT 



I desire to express my hearty thanks to Prof. Lafayette B. 

 Mendel for suggesting this subject and for his advice during 

 the progress of the work. 



Table 1.— Food intake of F.O.S. , October 26 to 29, 1920. 



Food. 



„,,,„ 



•*" 



_,„- 



,„,,,„, 



I;:S 



Nitrogen. 





S 



12.1 



163 



'"i 



127 



i:i 



10.17 









59 







25 







Tualatin capsules. ^ 



Nitrogen balance. 



Total intake in food 

 Output in urine 

 Output in faeces - 

 Total output in excreta 

 Balance, four-day period (plus) 

 Balance, average per day (plus) 



