112 2 PHYSIOLOGY 



the urine which is passed shortly after taking muscular exercise. Under this condition 

 the presence of albumin in the urine has no pathognomonic significance. 



The proteins generally found are identical with those of the blood-plasma and con- 

 sist of serum albumin and serum globulin. Their presence in the urine may be detected 



FIG. 521. Glucosazone. 



by the precipitate produced on boiling. In carrying out this test a few cubic centi- 

 metres of saturated salt solution should be added and one or two drops of dilute acetic 

 acid. A more delicate test is that known as Heller's. Some strong nitric acid is placed 



FIG. 522. Lactosazone. (PLIMMER.) 



in a test-tube and the urine is poured carefully down the side of the tube so as to form a 

 layer on the surface of the nitric acid. If albumin be present a white ring is formed at 

 the junction of the two liquids. 



SUGAR. Normal urine contains about one part per thousand of glucose. In 

 diabetes the power of assimilating carbohydrates is diminished or destroyed. The 



