URINALYSIS. 147 



Hain's Solution is the best to use in the test. The mere 

 change is not conclusive of the presence of sugar, 

 since a reddish brown is the test for sugar that is, the 

 color desired, but we may judge from the color to a 

 certain extent, whether sugar is present or not. 



FERMENTATION TEST. 



The fermentation test is performed as follows: 

 Take a saccharometer and place in it a small 

 part of a cake of yeast and fill it up to the bulb with 

 the urine to be tested; set aside until the next period, 

 and read off the amount of sugar in twelve hours in 

 a liter of the urine. The graduations on one side of 

 the apparatus represent grams to the liter; on the 

 other, grains to the ounce. 



PRACTICAL QUESTIONS IN NORMAL URINALYSIS. 



Give the histology of a urine-bearing tube. 



Give the theory of Ludwig in regard to the secretion 

 of the urine. 



Give C. H. Ralf's experiment on the cause of the 

 change in reaction between the urine and the blood. 



Give the histology of a glomerulus of the kidney. 



Give the theory of Bowman in regards to the secre- 

 tion of the urine. 



Give Heidenhain's theory of secretion of urine as 

 shown by an experiment. 



