a es 
ss 
252 ’ Scientific Intelligence. 
Experiment confirmed this theoretic view. By the action of 
strong sulphuric acid, the sulphocyanates take up H,© and yield 
he gas with effervescence. The method of its preparation is as 
ollows: 
acid and four volumes of water, is placed as much potassic sulpho- 
cyanate as will allow the mass to remain fluid e evolution of 
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a 
recallin perhaps that of H,S, though not at all disagreeable. It 
is soluble in its own volume of water, to which it communicates 
a ee . ee Eee an e 
: : H 
potash solution gives a copious black precipitate with ammonlo- 
Ugente nitrate ; no trace of cyanogen was found in the filtrate. 
fan temperatures, Passed over heated mercury in a 
ulb-tube, no change is observed, though if long boiled in the gas 
bs * mereuri¢ sulphid is formed, When sodium is treated in 
_* The success of this device is $ in all 
il oe The 68 is Gos ee 
