244 INFECTIOUS AND PARASITIC DISEASES. 



which acts so as to bring the red color of the blood more 

 prominently into view. 



Urine containing pus, when allowed to 



Pus. stand a short time, exhibits a heavy white or 



creamy precipitate. If shaken or poured 



out, it is seen to be tenacious or stringy. Pus is often 



associated with blood in the urine. 



Salol is so frequently prescribed, that 



Green attention is directed to the fact that urine 



Urine. voided by a patient taking it becomes green 



and eventually black upon standing. 



The quantity voided in the twenty-four 



Quantity, hours is subject to great variations, usually 



bearing a relation to the quantity of fluids 



ingested. Exercise, sleep, temperature, atmospheric 



moisture, all influence the urinary secretion. 



An adult ordinarily voids between twelve hundred 

 and fifteen hundered cubic centimeters (thirty-five to 

 fifty ounces) of urine in the twenty- four hours. Most 

 individuals do not void urine after retiring; and if this 

 has been the rule, a departure from this habit should be 

 viewed with suspicion. 



Polyuria is the condition in which unusually 

 Polyuria, large amounts of urine are passed in the 

 twenty-four hours. An extreme grade of 

 polyuria is common in diabetes; and in that form in 

 which sugar is also present (diabetes mellitus), twenty- 

 five or more liters (quarts) is not very unusual. 



