NORMAL FAT METABOLISM 211 



and may be collected from the fistula ; in others it is viscous and must be 

 washed out. In one dog used by the writer in which the fistula (about 14 

 inches of jejunum) had been established for about a year, a total of 0.72 

 gm. of fatty material, mainly soaps, was collected from the fistula in five 

 days. At least two kinds of soap were present, one in the form of soft 

 lumps, being probably palmitate, and the other in solution yielding a liquid 

 fatty acid and being probably oleate. Experimenters from time to time 

 have reported cases in which more fat appeared in the feces than was 

 present in the food. 



