On the Bases ( Organic) in the Juice of Flesh. 



297 



4. Properties of the Gold Salt of Sarcous Kreatinin. 



When sarcous tabular kreatinin is dissolved in diluted hydro- 

 chloric acid, and the solution mixed with one of auric chloride, a 

 splendid gold salt crystallises out, on evaporation over sulphuric acid, 

 in glistening yellow plates, which are permanent in the air and lose 

 no weight at 100 C. 



0-1060 gram of the gold salt of sarcous kreatinin, having been 

 dried at 100 C., left on ignition 0'0465 gram of gold, equivalent 

 to 43'86 per cent, of Au. 



Required for 

 C 4 H 7 N 3 O.HCl.AuCl 3 . 

 43"46 per cent. Au. 



Found. 

 43-86 per cent. Au. 



In the above calculation, the following atomic weights were 

 employed : 



H = 1, C = 12, N = 14, = 16, Cl = 35-5, Au = 196-8. 



The gold salt of sarcous kreatinin differs from the gold salts of all 

 the urinary kreatinins, described by me in June, 1887, in that it is 

 completely dissolved by ether. 



However, daring evaporation of its ethereal solution, even at the 

 ordinary temperature, the salt undergoes decomposition, and a 

 mixture of auric chloride and the hydrochloride of sarcous kreatinin 

 crystallises out. 



5. deduction of Cupric Oxide in Boiling Alkaline Solution by Sarcous 

 Kreatinin, compared with that of Glucose. 



O'l gram of sarcous kreatinin was dissolved in 50 c.c. of water. 



14-2 c.c. of this solution decolorised 40 c.c. of Pavy-Fehling solu- 

 tion, i.e., 0'0284 gram of kreatinin reduces as much cupric oxide 

 as 0'02 gram of glucose. Therefore 10 grams of C 6 Hi 2 O 6 are 

 equivalent in reducing power to 14'2 grams of C^T^O. There- 

 fore 4 mols. of glucose = 9 mols. of sarcous kreatinin, 



for 10 : 14-2 :: 180 : 255'6 



and 720 



= 4x(C 6 H 12 6 )180 



= C 6 H 12 6 



1017 :: 180:254-25. 



= 9x113(0^^30) 



The differences between the properties of the sarcous and urinary 

 tabular kreatinins will be apparent at a glance when arranged in a 

 table, as follows : 



x 2 



