438 Scientific Proceedings, Royal Dublin Society. 



from the liquid ; but on continuing the treatment, beautiful colour- 

 less crystals formed on the sides of the vessel. The crystals 

 were drained from the ethereal liquid, and when exposed to the 

 air were found to be easily reddened by the action of light ; they 

 were dissolved in a small quantity of hot water, the solution 

 filtered and then cooled, when beautiful silky crystals separated 

 which very closely resembled thiocarbamide in appearance, and 

 mode of crystallization. The purified compound proved on ana- 

 lysis to be CSefNH^),. 



When this point had been reached, the author learned from 

 the January number of the " Journal of the Chemical Society of 

 London," that M. A. Yerneuil had just published an account of 

 the same body in the Bulletin de la Societe Chemique de Paris. 

 I therefore did not continue the investigation, as M. Yerneuil is 

 fully entitled to priority, but now content myself with the exhi- 

 bition to the Society of the specimen of seleno-carbamide produced 

 in the Dublin University Laboratory. 



