418 Mr. G. Gore on Chemical Reactions. 



With a solution of iodine in bisulphide of carbon the follow- 

 ing positive results occurred : — A stream of hydrogen converted 

 it into a clear yellow liquid. Agitation with dilute sulphuric 

 acid and zinc decolorized it. White phosphorus converted it into 

 a pale yellow fuming liquid. It was quickly decolorized by 

 agitation with a strong aqueous solution of sulphurous acid. 

 Pentachloride of phosphorus removed its red colour. It was 

 also decolorized with varied degrees of rapidity by sesquicarbo- 

 nate of ammonia, potassium, hydrate of potash, hypophosphite 

 of potash, sulphide of potassium, and sulphite of potash. Sodium 

 converted it into a pale yellow liquid. It was decolorized by hy- 

 drate of soda, sulphide of sodium, hyposulphite of soda (especially 

 by an aqueous solution), peroxide of barium, baryta- water, sul- 

 phide of barium, lime-water, sulphide of calcium, soda-lime, slowly 

 by magnesium or aluminium — also by arsenic or bisulphide of 

 arsenic, each forming a yellow solution — by tersulphide of arsenic, 

 arsenite of soda, antimony in powder or tersulphide of antimony 

 (each left the liquid pale yellow), slowly by teroxide of bis- 

 muth, tersulphide of bismuth (which became a dark-red powder), 

 zinc, an alloy of zinc and sodium, sulphide of cadmium, prot- 

 oxide of tin, sulphide of lead, iron reduced by hydrogen, slowly 

 by hydrated oxide of nickel, carbonate of nickel, copper reduced 

 by hydrogen^ suboxide of copper, slowly by carbonate of copper, 

 also by arsenite of copper, mercury, oxide, sulphide, and sul- 

 phate of mercury, subchloride of mercury, oxide of silver, and 

 slowly by nitrate of silver. The percentage of negative results 

 with this liquid amounted to about sixty-six. 



A weak solution of bromine in bisulphide of carbon behaved 

 similarly to that of iodine. It was slowly decolorized by contact 

 with water, also by a stream of hydrogen or by agitation with 

 zinc and dilute sulphuric acid. White phosphorus decolorized 

 it rapidly with violent action, the product of decomposition 

 dissolving to a colourless liquid. Agitation with aqueous solu- 

 tions of sulphurous acid, hyposulphite, or bisulphite of soda 

 instantly removed its colour. Dry sulphite of potash or of soda 

 or bisulphite of soda, also decolorized it, less rapidly. Potas- 

 sium, sodium, magnesium, and aluminium were very slowly 

 corroded. The sulphides of sodium, barium, and calcium slowly 

 removed its colour. Metallic arsenic decolorized it with strong 

 action. Metallic antimony and the two sulphides of arsenic 

 decolorized it quickly. Teroxide of arsenic, teroxide of antimony, 

 tersulphide of antimony, and metallic tellurium gradually re- 

 moved its colour. 



Sulphide of cadmium, metallic tin, sulphide of lead, metallic 

 iron, copper reduced by hydrogen, carbonate of copper, metallic 

 mercury, and oxide of mercury decolorized it slowly. Silver 



