2 i76 
the urine is not a simple fluid, but the most 
heterogeneous of all the animal fluid products. 
It possesses certain characteristics in its healthy 
state; and very quick and manifest alterations are 
made in these, by those morbid states of the sys- 
tem which affect the whole digestive process. Yet 
this visible change is not always produced by such 
a state of the system as gives us notice of its ex- 
isting disorder. Not unfrequently we have no 
notice, from our feelings, of the existence of any 
fe 
morbid action, although it may have been sufficient : 
to modify the relative proportions of the constita- 
ent principles of the urine. Berzelius analysed 
the urine, and the following are his*results: 
ANIMAL PRINCIPLES. 
Water . . . . . . * ? . ° 933-00 
NO ee ge SO ee te ee. 30-10 
Lac AG ee ee ee 
Pure Lactic Acid, Lactate of Ammonia, and Animal 
Matters not separable from these ere he ., 
“ed 
Mucus of the Bladder ; : 
ALKALINE AND EARTHY SALTS. 
Sulphate of Potass .,  . es iS. ee 
of Soda - > . 3-16 
Phosphate of Soda me 2s re 
~ of Ammonia . . . 1-65 : 
‘Muriate of Soda A eC a 
—ee-- of Ammonia 1-50 
Farthy Phosphates with a trace of Fluate of Lime : ee 
. 
Silex. 
- . . « . 
ie “1000.00 
Besides these principles of healthy urine, ‘Dr. 
Prout observes that in different diseases it may 
contain Albumen, Fibrin, and the red particles of 
the blood ; Nitric acid ; various acids, which are 
found to be modifications of the Lithic; Oxalic 
ide; Cystic oxide ; Sugar ; Bile; and Pus. 
acid ; Benzoic acid; Carbonic acid; Xanthic ox- = 
