Intelligence and Miscellaneous Articles. 391 



stance mixed with water, and distilled, much sulpho-cyanic acid is 

 produced, and with the former acid sulphuretted hydrogen is also 

 evolved ; the volatile product reddened blue paper strongly, and gave 

 an intense crimson tint with permuriate of iron ; carefully saturated 

 with potash, it gave a coloured salt, but which possessed the proper- 

 ties of a sulpho-cyanuret. The alkalies produce singular phenomena 

 with sulfo-sinapisine; ammonia dissolves it and renders it either yel- 

 low or orange-yellow; by evaporation small brilliant crystals are 

 produced, which are sometimes red ; they contain no alkali, and ap- 

 pear to consist of the substance scarcely altered : in time, the am- 

 moniacal mixture becomes green. 



A solution of potash or soda renders the colour yellow, which 

 changes to orange and green ; the solution evaporated to dryness, 

 gives out an abundant odour of the volatile oil of mustard. When 

 the residue is calcined it fuses, especially with potash, as the sulpho- 

 cyanuret of this base does ; the remainder is charcoal mixed with 

 several salts, such as sulphates and sulphurets. 



The organic substance decomposed the sulphocyanurets which 

 were formed; for when the mass was not calcined, but dissolved, 

 accurately saturated with sulphuric acid, evaporated to dryness and 

 treated with alcohol, crystals were obtained by evaporation, which 

 though not well defined possessed all the principal characters of the 

 sulphocyanurets; namely, those of strongly reddening the persalts of 

 iron, and of forming a white precipitate in the persalts of copper, 

 when influenced by a deoxidizing body. 



The action of salts upon the aqueous solution of sulfosinapisine 

 is various ; the salts of lime, zinc, manganese, the acetate and 

 subacetate of lead, produce no effect ; the persalts of iron redden 

 it strongly; persulphate of copper, the protonitrate of mercury and 

 nitrate of silver all give white precipitates. Sulfosinapisine yielded 

 by analysis 



Carbon 50-504 



Hydrogen 7*795 



Azote 4-940 



Sulphur 9-657 



Oxygen 27-104 



100OOO 

 Journal de Pharmade, Jan. 1831. 



EMISSION OF LIGHT DURING THE COMPRESSION OF GASES. 



An evolution of light has been observed when certain gases have 

 been compressed suddenly. M. Soissy stated, in opposition to what 

 had been previously asserted, that it happens only with atmospheric 

 air, and with oxygen and chlorine. M. Thenard has however found 

 that when the pistons are moistened only with water instead of 

 grease, no light was evolved; these trials were made on the sup- 

 position that water or muriatic acid might be formed by action upon 

 the fatty matter. 



Various substances were then subjected to compressed oxygen 



and 



