_Monosulphid of Potassium and Bromid of Ethylene. 397 
_ The oxyd of sulphid of ethylene is readily soluble in water, 
and still more so in an acid solution; it is but slightly soluble 
in alcohol and in ether. Its solution in water has at first a sweet 
taste which afterward becomes astringent. 
small prisms terminated by two faces forming an obtuse angle 
form of a fine powder, on the addition of water. The depos 
~ Ron of the crystals in the sealed tubes results probably from the 
NZ nitric acid, whereby water is set free, and also, perhaps, be- 
_ tase they are less soluble in this acid when saturated with 
a hyponitric acid than when pure. : 
_rovided the oxydation has not been carried too far, an 
analysis of the crystals, taken from the tube and washed thor- 
_ SUughly with warm water, gives a little more carbon and hydrogen 
_ al correspond to the composition of the deutoxyd, showing 
. that they still contain, as an admixture, a little of the protoxyd. 
_ =e deutoxyd can however be obtained perfectly pure by dis- 
Solving the crystals in fuming nitric acid, precipitating by the 
