178 UEINE. 



basic value only amounts to about one half of what the 

 whole of the uric acid would require to be in the 

 condition of acid urate. These deposits are therefore 

 hyper-acid urates. 



Urine, systematic analysis. Test the action of the 

 urine with litmus. 



I. It is acid and has no sediment, proceed to 2. 



II. It is acid and has a sediment ; pour off the clear 

 liquid, filtering, if necessary, and proceed to ana- 

 lyse the filtrate according to 2. Examine the 

 sediment dry. 



1. Heat a sample of urine to boiling after the 

 addition of some acetic acid. A coagulum 

 forms, which does not disappear on the addition 

 of nitric acid : albumen. 



Boil some quantity (500 c.c.) of the urine 

 with acetic acid ; filter off the coagulated albu- 

 men and treat the filtrate as under 2. 



a. The coagulum is white, pure albumen. 



b. The coagulum is greenish : albumen, probably 

 coloured by bile. 



c. The coagulum is brownish-red : probably 

 from blood ; wash and dry the coagulum ; 

 boil with alcohol containing a little sulphuric 

 acid ; if the filtrate is reddish examine with 

 spectroscope for acid hecnatine or evaporate 

 to dryness, ignite, moisten the ash with a 

 drop or two of concentrated hydrochloric 



