URINE. 



257 



claim of the gastric juice upon the acidic radicals to further the 

 formation of hydrochloric acid for use in carrying out the diges- 

 tive secretory function. This change in reaction is known as the 

 alkaline tide and is common to perfectly healthy individuals. The 

 urine may also become temporarily alkaline in reaction to litmus, 

 as the result of ingesting alkaline carbonates or certain salts of tar- 



FIG. 81. 



DEPOSIT IN AMMONIACAL FERMENTATION. 

 a, Acid ammonium urate ; b, ammonium magnesium phosphate ; c, bacteria. 



FIG. 82. 



I Vo f^ *\(PJ( ^^ "* Jo ^ 



" r \!l&i5SS^' 



*-jf <r 



DEPOSIT IN ACID FERMENTATION. 

 a, Fungus, &, amorphous sodium urate ; c, uric acid ; d, calcium oxalate. 



taric and citric acids which may be transformed into carbonates 

 within the organism. Normal urine upon standing for some time 

 becomes alkaline in reaction to litmus, owing to the inception of al- 

 kaline or ammoniacal fermentation through the agency of micro- 

 organisms. This fermentation has no especial diagnostic value 

 18 



