40 PROCEEDINGS OF THE AMERICAN ACADEMY 



The analysis was made as in the case of the dibarium salt. 



0.5073 <rrm. salt dried in vacuo gave 0.0G14 grm. H^O = 12.10 % 

 Calculated for Ba (C5H(CH8)N,03) . 4H,0 = 12.60 % 



0.4472 grm. dried salt gave 0.2109 grm. BaSO, ; Ba = 27.73 % 

 Calculated for Ba(C5H(Cn3)N,Oj2 = 27.45 % 



Monocaldc methylurate, Ca(C.H(CH.j)NP8)2 • 3HoO. 



This salt was made from calcic carbonate in the same manner as the 

 monobarium salt, except that it was found necessary to boil the acid 

 with the carbonate for several hours, in order to ensure the complete 

 conversion of the acid. 



This salt has nearly the same properties as tlie monobarium salt. It 

 is a grayish substance, very soluble in hot water, and gelatinizes on 

 cooling. 



The analysis was conducted as in the case of the barium salts. 



0.2123 grm. salt dried in vacuo gave 0.0244 grm. H^O = 11.49 % 

 Calculated for Ca(C5lI(CH3)N,03)2 . 411^0 " = 11.89 % 



0.1864 grm. of dried salt gave 0.0600 grm. CaSO^ ; Ca = 9.43 % 

 Calculated for Ca(C5H(CH3)N,03)2 = 9.95 % 



A dicalcium salt has been obtained by the action of methyluric acid 

 on calcic hydrate, but has not yet been analyzed. 



The action of methyluric acid on plumbic carbonate was tried with 

 expectation of obtaining a lead salt, but the reaction does not seem to 

 work easily, for though carbonic acid is evolved, and sulphide of 

 hydrogen gives a slight precipitate with the filtrate, still the salt which 

 separates out on cooling does not seem to be homogeneous, and on 

 analysis gives but a very small percentage of lead. It probably con- 

 sists of tlie free acid with a small amount of lead salt. 



We thus see that there are two distinct sets of salts, and it is evident 

 that methyluric acid is dibasic, — a fact of considerable theoretical in- 

 terest, inasmuch as uric acid only forms two sets of salts, and not 

 without some bearing on the constitution of uric acid. 



Before closing. I wish to express my sincere thanks to Prof. IL B. 

 Ilill for his valuable advice, and for the kind interest which he has 

 taken in the progress of this work. 



