390 J. M. Crafts on the Product of the Reaction between 
Art. XXXVII.—Note on the Product of the Reaction between the 
Monosulphid of Potassium and the Bromid of Ethylene, and on 
several compounds derived from it;* by J. M. CRAFts. 
WHEN an alcoholic solution of monosulphid of potassium is 
mixed with the chlorid of ethylene, no reaction takes place im- 
mediately, but the mixture, after remaining exposed to the air 
several days, deposits a precipitate, whose composition is ex- 
pressed by the empyrical formula, C,H,S. When higher sul- 
phids of potassium are employed, compounds containing more 
sulphur than the preceding are still more readily obtained. 
These bodies, discovered by Léwig and Weidmann and described 
by them as sulphids of ethylene, can not be distilled, but are 
decomposed by heat into various products, of which the princi 
pal is a sulphuretted oil, whose composition has not been deter: 
mined. (Vide @melin, vol. iv.) No direct combinations of these 
sulphids with other bodies have been obtained, and they must be 
“considered as among those of the non-nitrogenous organic com- 
pounds, whose chemical character and properties are the least 
accurately known. 
It was with a view to studying the properties of the monosul- 
~ of ethylene, and particularly the action of chlorine and 
romine u 
a of potassium and the chlorid of ethylene, but resulted from 
estruction of the immediate product of the reaction, through 
* The latter portion of this research, relating to the sulphid of ethylene and > 
combi i$ with oxygen and with bromine, has been published in the 
Rendus of the French Academy of Science, liv, 1277, and lv, 382. The 
é used in this note are H=1; C=12; O== 16; S32; Br=80. 
