URINE. 263 



night. When this is done the urine voided between 8 A. M. and 

 8 P. M. may be taken as the day sample and that voided between 

 8 P. M. and 8 A. M. as the night sample. 



The qualitative testing of urine voided at random, except in a 

 few specific instances, is of no particular value so far as giving us 

 any accurate knowledge as to the exact urinary characteristics of 

 the individual is concerned. In the great majority of cases the 

 qualitative as well as the quantitative tests should be made upon 

 the mixed excretion for a twenty-four hour period. 



