180 PROCEEDINGS OF THE AMERICAN ACADEMY. 



and this suffices to explain fully all the reactions and decomposition 

 products of this acid. That the t'urazaue ring is a very stable one is 

 clearly evident from the experiments of Wolff.* Ehrenberg's product, 

 CaH^N^Og, is therefore very probably 



/ N = C-C-NH2 

 O^ I 



^N = C-OH; 

 his isofulminuric acid is identical with oxyfurazaue-carbonicamide, 



^N = COH, 



whereas the syrupy acid obtained by him is probably oxyfurazane- 



cyanide, 



, N = C-CN 



^ N = COH. 



The product obtained by myself, by means of concentrated potassic 

 hydrate, CgHNgO^K, H2O, is, on the other hand, probably identical 

 with potassic oxyfurazanecarboxylate, 



/ N = C-CO,K 



\N = C0H; 



it must therefore be obtained from all three of Ehrenberg's com- 

 pounds by saponification. Further experiments, with a view of 

 proving more sharply the constitution of these decomposition products 

 of cyauisonitrosoacethydroxamic acid, will be taken up again shortly. 



III. Desoxtfdlmincric Acid is identical with Ctanisonitro- 



CN-C : NOH 



soacetamide, 



HOC:NH. 



Liebigt and SchischkofFJ have shown that on boiling mercuric ful- 

 minate with ammonic chloride, or with potassic chloride and water, 

 a monobasic acid, HCsHaN^Og, is formed which, at present, is known 

 by the name of fulminuric acid. Ehrenberg § obtained the same acid 



* Ann. Chem. (Liebig), CCLX. 101. Cf. Ber d. chem Ges., XXIV. 1167. 

 t Ann. Chem. (Liebig), XCV. 282. t Il'id.. XCVTI. 53, CI. 213. 



§ Jourii. f. prakt. Chem., [2.], XXXII. 98. 



