DECOMPOSITION OF THE BILIARY CONSTITUENTS. 203 



non-hydroxylated aromatic acids which are also formed during the 

 process of intestinal putrefaction, and appear in the urine as hip- 

 puric acid and phenaceturic acid; or it may find its way to the 

 liver and be re-eliminated into the intestinal tract as glycocholic 

 acid. 



Bilirubin is reduced to hydrobilirubin during the process of 

 intestinal putrefaction and largely eliminated in the feces as such. 

 This reduction, according to Nencki, MacFadyen, and Sieber. 

 occurs in man, in the large intestine. A portion, however, is prob- 

 ably absorbed and eliminated in the urine as urobilin. 



