EXAMINATION OF URINARY DEPOSITS. 181 



the solution so formed will separate from the watery liquid, 

 and form a distinct stratum on the surface. 



Chylous Matter may be known by the urine being opaque 

 and milky in appearance, yielding fatty matter when agitated 

 with ether, and containing minute, amorphous, albuminous 

 particles, and perhaps also colorless globules, which may 

 possibly be mistaken for oil globules, from which their insolu- 

 bility in ether distinguishes them. 



ORGANIZED DEPOSITS may either be mucus, usually mixed 

 with epithelium ; pus ; blood ; or semen. 



Mucus. If the particles observed with the microscope are 

 round, or nearly so, and granulated on the surface, entangled 

 in tenacious, stringy masses, which do not break up and mix 

 uniformly with the liquid on agitation, it is probably mucus. 



Epithelial debris may be recognised by the peculiar form of 

 its particles. Mucous urine generally contains a considerable 

 amount of earthy phosphates and other matters. 



Pus may be known by the particles not being held together 

 by any tenacious matter, but floating freely in the liquid. The 

 granules of pus and mucus present almost the same appearance 

 under the microscope, although the latter may probably be 

 rather smaller and less distinctly granular. Acetic acid renders 

 the interior nuclei visible in both, but it coagulates the fluid 

 portion of the mucus. 



Even this test may be uncertain, on account of the dilution 

 of the mucous fluid, and also because the coagulation may have 

 been already occasioned by the presence of the large quantity 

 of water. When the quantity of mucus is abundant, however, 

 this test will be sufficient. 



Blood. When this is suspected in the urine, it may be 

 examined under the microscope for any blood corpuscles that 

 may be in it. If the blood has coagulated, they will probably 

 be entangled in the coagula, and may be forced out by gentle 



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