262 PROCEEDINGS OF THE AMERICAN ACADEMY 



orated to dryness on the water-bath, and the residue treated with a 

 mixture 6f absolute alcohol and ether. Amnionic chloride was left 

 undissolved, while in solution was a salt which gave qualitative tests 

 characteristic of the monamines. The platinum salt, recrystallized 

 from water, gave on analysis : — * 



0.5421 gr. left on ignition 0.2261 gr. platinum. 



Calculated for (CH 3 NH 2 ) 2 PtCI 6 . Found. 



Pt 41.61 41.75 



In order to find the relative amounts of ammonia and methylamine 

 which were formed in this reaction, we determined the percentage of 

 chlorine in the saline residue as obtained by distillation with plumbic- 

 hydrate. The residue of chlorides was dried at 100° and the chlorine 

 precipitated by argentic nitrate. 



0.6365 gr. mixed chlorides gave 1.4681 gr. AgCl . Cl 2 = 57.07% 

 Calculated for 2 molecules methylamine chloride 



and 1 molecule amnionic chloride . . . .= 56.50% 



Two molecules of methylamine are therefore formed in the reac- 

 tion and one molecule of ammonia. 



The liquid remaining in the flask, after the distillation, was filtered 

 hot, the lead precipitated as sulphide, and the filtered solution concen- 

 trated. On long standing crystals of glycocol separated, which, for 

 identification, were converted into the copper salt by boiling with 

 freshly precipitated cupric oxide, and precipitating the filtered solution 

 with alcohol. 



0.4757 gr. copper salt lost at 135° 0.0391 gr. H 2 0. 



Calculated for (C 2 H 4 N0 2 ) 2 Cu . H 2 Found. 



H 2 7.85" 8.22 



0-4291 gr. anhydrous salt left on ignition 0.1611 gr. CuO. 



Calculated for (C 2 H 4 X0 2 ) s Cu. Found. 



CuO 37.55 37.54 



The reaction may therefore be written : — 

 C 6 H 2 (CH 8 ) a N 4 8 + 5ILO = 3 C0 2 + NIL + 2 CILNIL+ C 2 ILN0 2 . 



Oxidation of Methyluric Acid. 



By the oxidation of diraethyluric acid with nitric acid we were 

 unable to obtain a crystalline product. Since the crystalline amalic 

 acid would undoubtedly have been formed had the two methyl radi- 

 cals been attached to the same urea residue, we concluded that our 

 sirupy oxidation product contained methyl alloxan, and for its iden- 



