522 



Mr. G. S. Johnson. 



The crystals were thus identical in their angles with those 

 measured by Kopp and. Heintz. 



Efflorescent Kreatinin, (C 4 H 7 N 3 0.2H 2 0). Measured by L. Fletcher and 



H. A. Miers. 



Long prisms. 



System — monosymmetric. 



Elements— a : b : c : : 0-6114 : 1 : ? ; y = 80° 18'. 



Forms observed— b {010} , c{001}, m{110}, ft{120}, /{130}. 



Observed. Calculated. 



58° 55J' 58° 55J' 



81° 42' 81° 42' 



39° 40J' 39° 41' 



28° 7' 28° 57' 



83° 45' 83° 49' 



85° 13' 85° 19' 



Analyses of ~Kreatinins from Urinary Kreatin by IAebifs Process. 

 Determinations of Water of Crystallisation in the Efflorescent Kreatinin 

 from Urinary Kreatin. 



The same difficulty was experienced in making these determinations 

 as in the case of the efflorescent kreatinin obtained directly from urine, 

 on account of the extreme rapidity of the efflorescence. 



Weight of 

 efflorescent 

 kreatinin taken 

 (in grams) . 



Loss of weight 

 at 100° C. 



Loss of weight 

 in 100 parts. 



Theoretical loss 

 for 



C 4 H 7 N 3 0.2H 2 0. 



0-726 

 0-465 



0-1736 

 0-114 



23- 91 



24- 51 



24 -16 

 24-16 



The formula C 4 H 7 N 3 0.2H 2 receives additional support from the 

 results of the ultimate analysis of the efflorescent kreatinin, before it 

 has undergone efflorescence. 



Combustion of Efflorescent Kreatinin (C 4 H 7 N 3 O.H 2 0) from Urinary 



Kreatin. 



Weight of 

 substance taken 

 in grams. 



Hydrogen 

 found. 



Carbon found. 



Hydrogen in 

 100 parts 

 found. 



Carbon in 

 100 parts 

 found. 



0-284 



0-0203 



-0917727 



7-16 



32-31 



Angles found. 

 bm 

 cm 



bh .. 

 of .. 



ch 



of .. 



