138 LABORATORY METHODS OF 



some discussion as to the relation between urea and 

 uric acid. The ratio between them is as one to forty- 

 five. (For further information see Medical Chemistry.) 

 At certain times of the day the reaction of the urine 

 differs widely. The time when it is acid is called the 

 acid tide, and when it is alkaline it is called the alkcb- 

 line tide. 



What are the most abundant constituents of the 

 urine ? 



What is said of the acids and metals in the urine? 



What is the cause of the odor of stale urine? 



Examine the spread of urine after the most im- 

 proved method. 



How do you make a microchemic-analysis ? 



UREA. 



With the ureometer make a test for urea. 



What is the normal per cent, of urea? 



What does urea represent in the body ? 



Give Schroder's theory in reference to the formation 

 of urea, as taught by an experiment. 



Where is urea formed in the body ? 



What is urea accumulation in the blood called? 



Is there any connection between urea and uric acid? 



What is an accumulation of uric acid in the blood 

 called? 



