URINE 



377 



Transparency. Normal urine is ordinarily perfectly clear and 

 transparent when voided. On standing for a variable time, however, a 

 cloud (nubecula) consisting principally of nucleoprotein or mucoid (see 

 page 413) and epithelial cells forms. A turbidity due to the precipita- 

 tion of phosphates is normally noted in urine passed after a hearty 



1 This dirty green or blue color also occurs after the use of methylene blue in the 

 organism. 



