142 



Mr. G. Gore on some Properties 



ammonia. Crystalline hydrated terchloride of antimony swelled con- 

 siderably, but did not dissolve. Oxychloride of antimony was not visibly 

 affected. Terbromide of antimony dissolved freely. Oxybromide of 

 antimony was very slightly dissolved. Teriodide of antimony became 

 yellow with apparent chemical action, and a portion dissolved and formed 

 a dense layer beneath the colourless liquid ammonia. Black and red 

 sesquisulphides of antimony were not visibly affected, but each imparted 

 a faint purplish-blue colour to the liquid. Orange sulphide of antimony 

 dissolved to some extent, forming an opaque brownish-green solution, 

 and separated again on evaporation of the liquid. Yanadic acid and 

 nitride of vanadium produced no visible effect*. " Molybdenum " (in the 

 state of a fine black powder) imparted a weak cobalt-blue colour to the 

 liquid, but did not visibly diminish in bulk. Molybdic acid became quite 

 white, but did not dissolve. Native sulphide of molybdenum, " tung- 

 sten " (in the state of a black powder), and tungstic acid produced no 

 visible effect. 



Metallic bismuth, hydrated oxide of bismuth, and fluoride of bismuth 

 were not visibly affected. Chloride of bismuth (not anhydrous) swelled 

 greatly, and dissolved rather freely, but partly returned to its original 

 bulk after the liquid had evaporated. Carbonate of bismuth and sulphide 

 of bismuth were not visibly altered. 



Metallic osmium was not visibly affected. Osmic acid was chemically 

 altered, and produced first a yellow, then a red, and finally a brownish- 

 black opaque mixture, consisting of solid particles suspended in a com- 

 paratively colourless liquid : on evaporation of the liquid, the solid 

 substance remained behind. Black oxide of iridium, also scales of osmi- 

 iridium, produced no visible effect. Metallic palladium was not affected. 

 Bichloride of palladium became white, and enlarged in bulk, and slightly 

 dissolved to a clear yellow liquid ; the residue remained white and of 

 enlarged bulk after evaporation of the liquid. Sulphide of palladium was 

 unaffected. Black oxide of platinum was not visibly affected. Bichloride 

 of platinum became nearly white, and slightly dissolved, forming a 

 slightly yellow solution. Tetrachloride of platinum behaved like the 

 bichloride. Tetraiodide of platinum turned red, dissolved freely to a 

 reddish-yellow liquid, crystallized in red needles on evaporation of the 

 solution, and finally left a black residue. Terchloride of gold was decom- 

 posed, and the product very slightly dissolved. 



Bright silver was unaffected. Oxide of silver swelled considerably, but 

 did not dissolve ; it contracted again after evaporation of the liquid. 

 Peroxide of silver (formed by electrolysis of a pure solution of argentic 

 fluoride with platinum electrodes) became brown, and made the liquid 

 slightly yellow, but did not visibly alter in bulk. Argentic nitrate 

 dissolved freely, and on evaporation of the liquid long crystalline needles 

 separated. Brown argentic fluoride swelled a little, became somewhat 

 * Given to me by Dr. Roscoe. 



