The Urine. 



217 



Chlorides are detected by acidulating the urine with dilute 

 nitric acid, and adding a few drops of silver nitrate ; the 

 white curdy precipitate is completely soluble in strong 

 ammonia, but insoluble in nitric acid. This test should be 



Fig. 16.— Crystals of Uric Acid (Funke). 



regularly used in cases of pneumonia, where a decrease in 

 chlorides occurs which persists until death ; the return of 

 chlorides generally means recovery. It is obvious that the 



Fig. 17. — Crystals of Oxalate 

 of Lime (Funke). 



Pig. 18.— Crystals of Carbonate 

 of Lime (Funke). 



same bulk of urine should always be acted upon, as it is 

 simply by judging the depth of the precipitate that we 

 can surmise an increase or decrease in the chlorides, and 



