URINE. 219 



As the fixed salts contained a mere trace of chloride of so- 

 dium, and nitrate of silver added to the urine showed that the 

 chlorides were in excess, it is clear that nearly all the chlorine 

 must be referred to the hydrochlorate of ammonia. That the 

 sediment consisted of urate of soda was proved chemically as 

 well as microscopically. The uric acid was determined by the 

 ordinary test; and the soda by incinerating a portion in a 

 platinum spoon, dissolving the white residue in dilute sulphuric 

 acid, evaporating, and obtaining crystals of sulphate of soda. 



On the following day, (the eleventh,) the odour remained 

 nearly unchanged, but acetate of lead and perchloride of iron 

 showed that the amount of hydrochlorate of ammonia was 

 diminished. There was a small flocculent sediment composed 

 of urate of ammonia, mucus, and fragments of epithelium, but 

 entirely free from urate of soda. The urine now contained a 

 normal amount of uric acid, and about as much albumen as on 

 the preceding day. 



On the twelfth day the peculiar odour was very faint, and on 

 the thirteenth it altogether vanished. The urine was still alkaline, 

 but gradually resumed its normal characters. 



There was nothing in the treatment to account for the pro- 

 duction of the sulphuretted hydrogen, and it can hardly be 

 ascribed to the decomposition of the small quantity of albumen 

 in the urine. 



Zimmermann once detected fibrin in the urine of a patient 

 with pneumonia on the third day. The secretion was of a fiery 

 red colour, but deposited no sediment.] 



Pleuritis. 



In pleuritis the urine comports itself much the same way as 

 in pneumonia. It exhibits, especially at the height of the in- 

 flammation, all the signs of inflammatory urine, and sometimes 

 contains albumen. 



In order to form a correct opinion regarding the urine in 

 this disease, it is of especial importance to pay attention to the 

 various circumstances that may modify the nature of the secre- 

 tion, as for instance whether the disease is simple or compli- 

 cated, acute or chronic, whether there is much or little fever, 

 to what extent the inflammation has proceeded, and whether 

 there is any effusion. Becquerel observed several instances of 



