THE INORGANIC CONSTITUENTS OF URINE. 



83 



vessels, still when mixed with decomposing matters it has a 

 marked tendency to putrefy. Insist that all urinary vessels 

 be scrupulously clean ; and that all instruments introduced into 

 the bladder be pro- 

 perly purified by car- 

 bolic acid or other 

 germicide. 



(a.) Place some 

 normal urine a- 

 side for some days, 

 preferably in a 

 warm place. Ob- 

 serve it from day 

 to day, noting its 

 reaction, change 

 of colour, trans- 

 parency, odour, 

 and any deposit 

 that may form in 

 it. Examine the 

 deposit microsco- 

 pically (Figs. 16, 

 17). u 



Fi 



.g. 17. Deposit in ammoniacal urine (alka- 

 line fermentation). a, Ammonio-magnesium 

 phosphate ; d, acid ammonium urate ; c, bac- 

 terium urea3. 



Fermentation is hastened by a high temperature, and especially 

 if the urine be passed into a contaminated vessel, or the urine 

 itself contain blood, much mucus or pus. It is retarded in a 

 very acid and concentrated urine. 



LESSON XIY. 



THE INORGANIC CONSTITUENTS OF 

 URINE. 



The ratio of inorganic to organic constituents is 1 to 1*2 1'7. 



1. Water is derived from the food and drink (normal quantity 

 1500 cc., or about 50 oz.) 



