146 



Mr. G. Gore on some Properties 



so. Fluoride of potassium was very slightly soluble. Chloride of potas- 

 sium was not visibly affected. Potassie bromide dissolved sparingly, and 

 crystallized on evaporation of the liquid. Iodide of potassium was freely 

 soluble. Silico-fluoride of potassium was insoluble. Chloriridiate of 

 potassium crystals were superficially changed to a brown colour, but did 

 not dissolve. Permanganate of potassium dissolved very freely to a deep 

 purple-red solution, and was left behind on evaporation of the liquid. 

 Chromate of potassium dissolved to a minute extent. Potassie bichromate 

 dissolved somewhat, and formed a yellow solution. Chrome-alum was 

 only superficially changed. Fluozirconate of potassium was not visibly 

 affected. Metallic rubidium behaved like sodium and potassium. Fluoride 

 of rubidium was insoluble. 



Nitrate of ammonium dissolved very freely. Chloride of ammonium 

 also dissolved very freely, and did not crystallize until nearly all the 

 liquid had evaporated. Carbonate of ammonium, ammonium vanadate, 

 and ammonium metavanadate produced no visible effect. 



Uric acid and paracyanogen were unaffected. Argentic cyanide dis- 

 solved very freely and rapidly, and crystallized in scales on evaporation of 

 the liquid. Cyanide of mercury dissolved freely, and crystallized only on 

 evaporation of the last portions of the liquid. Cupric cyanide turned 

 deep blue, and dissolved to some extent. Cupric ferrocyanide was 

 converted into a dark green solid. Cyanide of zinc was very little 

 affected. Potassie cyanide was insoluble. Potassie sulphocyanide dis- 

 solved to some extent. Ferrocyanide of potassium produced no effect. 

 Fusel-oil, ether, alcohol, aldehyde, and chloroform mixed freely and 

 perfectly. Alloxan became of a deep purple-red colour, and dissolved 

 freely, and left a purple-red solid after evaporation of the liquid. 

 Succinic acid was insoluble. Indigo dissolved sparingly, and formed a 

 reddish-brown solution. Sulphate of quinine dissolved to some extent. 

 Gutta percha imparted a brown colour to the liquid, and a sticky residue 

 was left on evaporation. Paraffin, anthracene, and naphthalin were not 

 visibly affected. Amylene would not mix with the liquid. Mesitylene 

 behaved similarly. Starch swelled and mixed as it does with water, but 

 did not form a clear solution. Glycerine mixed perfectly. White sugar 

 dissolved freely, and left a gummy residue on evaporation of the liquid. 

 Isinglass rapidly became semifluid. Camphor dissolved copiously, and 

 crystallized when the liquid evaporated. Gum-copal dissolved only to a 

 minute extent. Gun-cotton dissolved sparingly, and the solution left a 

 film on evaporation. Bengal silk was quite insoluble. 



A few experiments were made for the purpose of examining the 

 chemical properties of the solution of potassium by placing other sub- 

 stances inside the tubes with that metal, and then distilling the ammonia 

 into contact with them. C 2 Cl 6 prevented the production of the blue 

 colour. C 2 Cl 4 produced chemical action, and prevented the blue colour ; 

 the residue was a white solid, exhibiting no signs of free carbon. CBr 4 



