276 Prof. H. Rose on the Inm-ganic Constituents 



Examination of the Urine. — As the residue of the evaporated 

 urine was very difficult to dry at 212° F., it was carbonized 

 at once. 



Aqueous extract. — This contained by far the greater part of 

 the inorganic constituents of the urine. In the urine excreted 

 during four days, it amounted to no less than S^'l^S grms. 

 These consisted of — 



Chloride of sodium . 62*78" 



Chloride of potassium 9*89 



Potash 15-40 



Magnesia .... 0'32 



Phosphoric acid . . 8*92 



Sulphuric acid . . 2*69 



lOO'OO. 



^NaCl . . 

 KCl . . 



KG, SOg . 



^or of<i 2KO+PO5 

 3KO4-PO5 

 2MgO+PO. 



62-78 

 9-89 

 5-87 



16-12 

 4-55 

 0-42 



SMgO + POs 037 

 100-00 



Muriatic extract. — It amounted to 5*085 grms., and con- 

 sisted of — 



100-00 



100-00 



Residuary carbonaceous mass. — This left a very small quan- 

 tity of ash on incineration, only 0-352 grm., the principal 

 component of which was silica, weighing 0-156 grm.; the 

 remainder consisted almost entirely of phosphate of magnesia. 

 It has been suggested above, that this small quantity of inor- 

 ganic constituents existed in the urine in a perfectly oxidized 

 state, and had resisted the solvent action of the muriatic acid, 

 probably because the magnesia had formed with the silica a 

 compound insoluble in dilute muriatic acid. 



If this view be adopted, all the inorganic constituents exist 

 in the urine in a perfectly oxidized state; hence it is a per- 

 fectly teleoxidic substance. 



The following are therefore the inorganic constituents of 

 the carbonized mass of the evaporated urine : — 



