1871.] Mr. G. Gore on the Solvent Power of Liquid Cyanogen. 69 



Substances insoluble in liquid Cyanogen at 60° Fahr. — Water (nearly- 

 insoluble, would not mix with the liquid*, and produced no chemical 

 change). Iodic acid. Fine lampblack. Well-burned wood-charcoal (two 

 kinds). Crystals of boron. Boracic acid. Crystals of silicon. Precipi- 

 tated silica. Titanic acid. A fragment of sulphur. Selenium. Selenious 

 acid. Tellurium. Arsenic. Arsenious and arsenic acids. Realgar. Orpi- 

 ment. Antimony. Antimonic oxide. Antimonic acid. Fused fluoride 

 of antimony. Red sesquisulphide of antimony. Bismuth. Fluoride of 

 bismuth. The oxides of iridium and silver. Argentic nitrate, fluoride, 

 chloride, iodide, and iodate. Mercury. Mercuric chloride. Copper. 

 Cuprous iodide. Chloride of Nickel. Iron. Mundic. Peroxide of man- 

 ganese. Fluoride of manganese. Chromic oxide. Violet chloride of 

 chromium. Oxide and fluoride of uranium. Red oxide and peroxide of 

 lead. Plumbic chromate. Tin. Cadmium. Sulphide of cadmium. Zinc. 

 Tungstic and niobic acids. Oxide of cerium. Carbonate of glucinum. 

 Aluminium. Magnesium. Magnesia. Dry lime. Anhydrous carbonate of 

 sodium. Potassic nitrate, bromide, iodate, and fluozirconate. Bichro- 

 mate and bitartrate of rubidium. Bitartrate of caesium. Chloride and 

 carbonate of ammonium. Oxalate of cerium. Paracyanogen. Cyanide 

 of mercury. Nitrocyanide of titanium. Pyrogallic, gallic, tannic, and 

 succinic acids. Sulphate of quinine. Alloxan. Starch. Milk-sugar. 

 Egg-albumen. Gun-cotton. The gums ammoniac, animi, copal, dam- 

 mar, elemi, galbanum, guaiacum, juniper, kowrie, mastic, myrhha, oliba- 

 num, opoponax, sagapenum, seed-lac, shellac, thus, and tragacanth. Yel- 

 low resin. Egyptian asphalte. Gutta percha. India-rubber. Paraflin. 

 Anthracene. Stearine. Bee's-wax. Spermaceti. Aloes — Barbadoes, 

 Cape, hepatic, and Socotrine. Brazil-wood. Red sandal -wood. Cuba 

 yellow fustic. Terra-japonica. 



The following substances produced some changes, but did not dissolve : 

 — Perfectly white and dry iodic acid made the liquid of a pink colour. 

 Dry selenious acid and iodate of potassium became slightly pink. Yellow 

 chloride of nickel (nearly anhydrous) became at once green f. Cuprous 

 iodide acquired the colour of vermilion. Sesquicarbonate of ammonium 

 became brown. The gums myrrha and guaiacum coloured the liquid yel- 

 lowish. Bisulphide of carbon, saturated with sulphur, rapidly set free its 

 sulphur in the form of crystals, the bisulphide being absorbed and dis- 

 solved by the cyanogen. A saturated solution of phosphorus in bisul- 

 phide of carbon quickly liberated its phosphorus iu a similar manner, but 

 not in a crystalline form. The contact of moisture and an alkaline sub- 

 stance with the liquified gas caused the formation of a brown solid body, 

 apparently paracyanogen. 



From these results it is evident that liquid cyanogen, at 60° Fahr., is a 

 remarkably inert body, and possesses very little solvent power for sub- 



* See Gmelin's Handbook of Chemistry, vol. vi. p. 388. 



t Probably in consequence of the presence of a trace of moisture. 



