38 METABOLISM OF ORGANIC AND INORGANIC PHOSPHORUS. 



are important for the welfare of the organism, but in .phosphorus- 

 feeding experiments the two named stand out most prominently. 

 The second rabbit fed organic phosphorus was in poor condition 

 during the test and died of pneumonia at the end of the second week; 

 consequently the results in this case must not be given the same 

 weight as in the others. Throughout this period all of the rabbits 

 remained practically constant in weight. -,Nos. 3 and 4 received 

 more nitrogen and phosphoric acid than did Nos. 1 and 2 on an 

 average, but Nos. 1 and 4 received practically the same amounts. 

 The nitrogen and phosphorus balances were positive, except in the 

 case of rabbit No. 2, which died, and naturally would show a nega- 

 tive set of balances. 



NITROGEN BALANCES. 



The analytical data obtained during the experiment are recorded 

 in Table III. 



TABLE III. Nitrogen and phosphoric acid balances Principal period. 

 RABBITS FED ORGANIC PHOSPHORUS. 



RABBITS FED INORGANIC PHOSPHORUS. 



6 Including 1.42 grams of inorganic phosphorus added to the food per period. 



