Aug. i6, 1915 



Phosphorus Metabolism of Lambs 



469 



Table yill. ^Different forms of phosphorus in the feces 

 [Results expressed in percentage of the fresh substance] 



Tabi,^ XIII. — Different forms of phosphorus excreted by lambs 

 [Results expressed in grams per day] 



As is usually the case with herbivora, by far the largest part of the 

 phosphorus was excreted in the feces. With these lambs the quantities 

 of phosphorus in the urine were all less than 0.02 gm. per day, while 

 those in the feces ranged from 2.6 to 5.3 gm. per day. Evidently, there- 

 fore, the phosphorus of the feces is not unassimilated, but in large part 

 is assimilated material which has been excreted into the intestine. 

 Probably the data of the acid-insoluble form more nearly represent those 

 of the undigested phosphorus than do any other figures. 



