464 
DR. RONALDS ON SULPHUR AND PHOSPHORUS IN URINE. 
In another experiment, in which the same portions of urine were employed as at the 
fifth column of the foregoing Table, the following were the results: — 
Phosphate of barytes obtained from the P0 5 Phosphate of barytes obtained from 1016 grs. 
naturally contained in 1016 grs. of urine. of urine after deflagrating with nitre. 
BaO P0 5 3T35 grains BaO P0 5 5'313 grains 
= PG 5 0-993 =P0 5 1-687 
= P 0-435. — P 0-740. 
Therefore 0 - 305 grain of phosphorus was contained in the 1016 grains of urine in an 
unoxidized state, which, calculated for the whole amount of urine passed in twenty- 
four hours, would amount to 5‘896 grains. In some other specimens of urine which 
I examined there was however no approach to this quantity of phosphorus in an un- 
oxidized state, and as the mode of analysis employed in these preliminary experiments 
was not the most accurate, I intend to make the determination of the quantity of 
phosphorus the subject of further experiments. 
The only opportunity I have had of examining urine in a diseased state, was a 
portion obtained from a patient suffering from diabetes mellitus. As might have 
been anticipated from the character of this disease, the amount of sulphur which 
the urine contained in an unoxidized state, was considerably greater (by one-fourth) 
than in healthy urine. 
The diabetic urine had a specific gravity of 1046. 
Of this urine 1046 grains, precipitated with nitrate of barytes, gave — 
4’308 grains sulphate of barytes =P479 grain S0 3 
= 0’592 grain S. 
After the precipitation of the sulphuric acid by baryta, the urine was evaporated 
down with nitric acid, mixed with nitre and deflagrated. An excess of nitrate of 
barytes having been used to precipitate the sulphuric acid, there remained on treat- 
ing the fused mass with dilute nitric acid, an insoluble residue of sulphate of barytes, 
the sulphuric acid of which had been derived from the oxidation of the sulphur by 
the nitre ; the sulphate of barytes amounted to 
T837 grain =0"629 grain sulphuric acid 
= 0-251 grain sulphur, or 0 - 024 per cent., 
whilst in healthy urine the sulphur in this state never exceeded 0*018 per cent. 
