38 PROCEEDINGS OF THE AMERICAN ACADEMY 



ate in slight excess over the calculated amount. The acid dissolves on 

 the addition of the potassic carbonate with disengagement of carbonic acid. 

 The solution was then boiled for some time, until the effervescence 

 ceased, and precipitated with alcohol; allowed to stand twenty-four 

 hours, filtered, washed with alcohol, and dried as in the case of the 

 dipotassic salt. 



This salt is quite like the dipotassic salt. It is very soluble in hot 

 water, gelatinous on cooling, and is insoluble in alcohol. 



The method of analysis was the same as for the dipotassic salt, with 

 the exception that the potassium was estimated in the hydrous salt. 



0.3161 grm. of salt di-ied in vacuo gave 0.0228 grm. H^O = 7.21 % 

 Calculated for KCJi^CCHjjN.Oj.H.O = 7.56% 



0.3766 grm. of salt dried wt7a(;Mo gave 0.1152 grm. KCl ; K= 16.01 % 

 Calculated for KC5H2(CH3)N^03 . II^O = 16.42 % 



Disodic methyhirate, Na,C5H(CIl3)NP3 . 3II2O. 



This salt was made bv dissolving; the acid in an excess of sodic 

 hydrate and precipitating with alcohol, exactly as in the case of the 

 dipotassic salt, which it closely resembles. 



The analysis was conducted in the same way as above. 



0.6691 grm. of salt dried in vacuo gave 0.1287 grm. H^O = 19.23 % 

 Calculated for Na2C5n(CH3)N,03 . 3H,0 = 19.28 % 



0.4548 grm. dried salt gave 0.2304 grm. NaCl ; Na = 19.92 % 



Calculated for Na2C5H(Cn3)N,03 = 20.35 % 



Monosodlc methylurate, l^a.C^:l.XCYi^)l!ifi.^ . H2O. 



This salt was made by adding, very carefully, a solution of Na.,SO^ 

 to a boiling-hot solution of monobaric methylurate until there is no 

 further precipitate of baric sulphate. The solution was then filtered 

 from the BaSO^, evaporated to a very small quantity, and then pre- 

 cipitated with a large amount of alcoljol 100 to 150 cc. ; allowed to 

 stand twenty-fovtr hours, filtered, washed with alcohol, and dried in 

 imcuo. This salt does not seem to be quite as gelatinous as the rest, 

 and is much more soluble in dilute alcohol. 



In the analysis of this salt the water was determined as above, and 

 the sodium by ignition of the anhydrous salt, and treated with a few 

 drops of sulphuric acid. 



