URINE. 313 



inf. senega for four days the haematuria ceased. The secretion 



was then analysed ; its specific gravity was 1022, and it con- 

 tained in 1000 parts : 



Water .... 966-2 



Solid constituents . . . 33-8 



Urea 18-5 



Uric acid . 



Lactic and extractive matter 



Soluble salts 



Earthy phosphates and mucus 



0-9 

 6-4 

 5-2 



1-8] 



In our observations on scarlatina we remarked that in the 

 anasarca which so frequently succeeds that disease, the urine 

 sometimes contains albumen, and sometimes is free from it. 



In ovarian dropsy the urine, according to Schonlein, is very 

 scanty ; it contains a large quantity of albumen, which increases 

 in amount as the disease advances. 



Jaundice. 



In jaundice, whether it be idiopathic or symptomatic, the 

 urine contains bile-pigment, which shows itself in the peculiar 

 colour which it communicates to that fluid. But it sometimes 

 also contains other constituents of the bile, for I have detected 

 biliary resin in icteric urine, and Gmelin found cholesterin in 

 a case in which the flow of bile was impeded. 



The colour of icteric urine may vary from a saffron-yellow to 

 a yellowish-brown, brownish-red, or blackish-brown; if there 

 is any doubt whether the colour is produced by biliphaein, we 

 must adopt the steps described in page 192, which will readily 

 determine the point. The presence of bilifellinic acid may 

 sometimes be detected by the taste, and always by the directions 

 given in page 193. 



The specific gravity of icteric urine is variable : it depends, 

 (as do the proportions of the ordinary normal constituents,) upon 

 the relative state of the organism, upon other complicating dis- 

 eases, and upon the absence, presence, or degree of vascular 

 disturbance. 



In acute icterus accompanied by fever, Schonlein found the 

 urine at first of a dark red or brown colour from the presence 

 of bile-pigment ; it afterwards became gradually darker, and at 

 last as black as ink. 



