364 PROCEEDINGS OP THE AMERICAN ACADEMY 



We do uot pretend to determine, however, whether the hydroxyl is 

 attached to the mercury or to the nitrogen, which in the latter case 

 would be in the quinquivalent condition. 

 I. 0.299 grm. of substance dissolved in hvdrochloric acid and treated 



with sulphuretted hydrogen gave 0.2164 grm. of mercuric 



sulphide. 

 ir. 0.2756 grm. of substance gave 0.1994 grm. of mercuric sulphide. 



Calculated for Found. 



Cr.HsCSO.NHUgOUJs. I. II. 



Mercury 62.30 62.38 62,38 



[Cgri3(SO^NH)o]oHg3. This salt was prepared like the preceding, 

 by boiling the moist mercuric oxide from 0.65 grm. of mercuric chlo- 

 ride with 0.5 grm. of the amide in aqueous solution. Even greater 

 difficulties were encountered than in the preceding case, the reaction 

 taking place as slowly, and being less complete ; on this account we 

 have not succeeded in preparing the substance in a state of purity, as 

 the following analysis shows ; the difference is due to a slight excess 

 of mercuric oxide, which could not be removed, but the result is near 

 enougli to leave no doubt about the formula of the compound. 



0.3416 grm. of substance dried at 100" gave 0.2056 grm. of mer- 

 curic sulphide. 



Calculated for [CcH3(S02Nn)3]2Hg3. Found 



Mercury 49,02 51.88 



Both substances are white powders, insoluble in water, soluble in 

 hydrochloric acid, which form mercuric iodide when boiled with water 

 and iodine for some time ; the filtrate, however, contains no organic 

 substance except unaltered benzoltrisulphamide. 



The aqueous solution of the amide boiled with plumbic oxide 

 formed white flocks, but the action took place with so much difficulty 

 that we did not try to prepare the substance for analysis. With 

 cupric oxide we could observe no action. A solution of the sulphate 

 of cuprammonium took up the amide with great avidity, forming a 

 dark blue solution, which deposited azure blue disks of so deep a tint 

 as to look nearly black, while the mother liquor showed only a very 

 pale blue color. The solid was but sparingly soluble in water, being 

 decomposed by it, but tolerably stable in the dry state ; dissolved in 

 dilute hydrocliloric acid, it gave no precipitate with baric chloride. It 

 was dried in a desiccator, and its composition determined by the 

 following analyses. 



