150 Intelligence and Miscellaneous Articles. 



the Academy of Sciences, in which he states that the perchlo- 

 ride of iodine, when put into water, suddenly decomposes it, and 

 occasions the formation of iodic and muriatic acid. When it is 

 put into alcohol the same effects are produced ; and as the iodic acid 

 is insoluble in ulcohol, its action affords a ready method of separat- 

 ing the two acids ; the iodic acid is deposited in the state of a co- 

 lourless crystalline powder ; iodic acid is one of the most sensible 

 reagents for detecting the presence of the vegetable alkalies, with 

 which it combines to form compounds of very little solubility, so 

 that, according to M. Serullas, the hundredth part of a grain of the 

 alkali may be detected. These compounds, when dried, detonate 

 strongly if heated much above the temperature of boiling water. 

 Le Globe, Nov. \\th. 



CHLORIDE OF GOLD AND POTASSIUM, &C. 



M. Berzelius finds this salt to consist of 



Chloride of potassium . . 1 7*525 



Gold 46-800 



Chlorine 25'050 



Water 10-625 



100-000 



This salt crystallizes sometimes in striated prisms, truncated at the 

 extremities, and sometimes in hexagonal plates ; the colour is yellow- 

 ish-orange, and the crystals effloresce very readily in dry air. 

 The chloride of gold and sodium consists of 



Chloride of sodium . . . 14-466 

 Chloride of gold .... 76002 

 Water 9'532 



100-000 



This salt crystallizes in prisms of an orange-red colour ; it does not 

 part with its water of crystallization without at the same time losing 

 chlorine. Ann. de Chim., Sp.pt. 1830. 



VAUQUEIJN'S PROCESS FOR OBTAINING CHROMIUM. 



When an attempt is made to procure chromium by employing the 

 oxide and charcoal, the operation never succeeds well, whatever may 

 be the degree of heat to which the mixture is subjected. The chromic 

 acid is more readily reduced than the oxide, and 72 parts yielded 24 

 parts of metallic chrominm. The muriate of chrome is that which suc- 

 ceeded best, and in the following manner : Treat chromate of lead in 

 fine powder with 4 or 5 times its weight of muriatic acid, until it is per- 

 fectly dissolved j then evaporate to dryness and dissolve the muriate 

 of chrome by alcohol, that there may be no chloride of lead. 



Evaporate again at a moderate temperature, to the consistence of a 

 syrup, and make it into a mass with a sufficient quantity of oil and a 

 little charcoal, to make it into a paste ; put it in a small crucible, in- 

 closed in another crucible filled with charcoal powder, and heat it in 

 a good forge fire for about an hour. Ibid. 



CARBURET 



