On Kreatinins. 



513 



"Weight of 

 efflorescent 

 kreatinin taken. 



Loss of "weight 

 at 100° C. 



Loss per cent. 



Re quired for 

 C 4 H r X 3 0.2H 2 0. 



gram. 

 0-3195 









0-0770 



24 10 



24-17 



'4230 



o-iooo 



23 64 



24-17 



When a weighed quantity of the effloresced kreatinin of urine is 

 dissolved in boiling water, and the solution evaporated to dryness in 

 vacuo over sulphuric acid, the weight of tabular kreatinin a. obtained 

 is identical with that of the effloresced kreatinin taken. 



This fact indicates that the percentage composition of the two 

 bodies is identical ; a view which is fully supported by the results of 

 their ultimate analysis. 



Description of 

 substance. 



Weight of 

 substance 

 in grams. 



Weight of 

 hydrogen 

 found. 



Weight of 

 carbon 

 foiind. 



H in 

 100 

 parts. 



C in 

 100 

 parts. 



Tabular kreatinin a 



-3170 



0-02015 





6-35 





Tabular kreatinin o 



-2080 





-088036 





42 32 



Effloresced krea- 

 tinin of urine. . . . 



0-3968 



0-0260 



0-16541 



6" 55 



41-68 



Description of substance. 



Weight of 

 substance 

 in grams. 



Yol. of 

 nitrogen at 

 0° C. and 

 760 mm. 



Weight of 

 nitrogen 

 in grams. 



N in 

 100 

 parts. 



Tabular kreatinin a of urine 



-1754 



cc. 

 52-64 



-066032 



37-64 



Effloresced kreatinin of urine 



1540 



45 73 



0-05736 



37-24 



The following table shows that these results agree well with the 

 formula C 4 H 7 N 3 :— 



Found in Found in Required for 



tabular K. effloresced E. C 4 H 7 X 3 0. 



Carbon 4232 .... 41-68 .... 42 478 



Hydrogen 6'35 .... 6*55 .... 6194 



Nitrogen 37'64 .... 3724 37*168 



Oxygen (difference) 13-69 (difference) 14*53 14-160 



. 100-00 100-00 100-00 



