1815.] KoTjal Society. 36!> 



result might be more fortunate. Accordingly lie caused a current 

 of t'uchlorine gas, dried by jmssing through muriate of lime, to act 

 upon iodine. A combination took place. When the solid body 

 formed was exposed to a moderate heat, chloriode was driven off in 

 the state of vapour, and an oxiode, or compound of oxygen and 

 iodine, remained behind. This substance is solid, of a white 

 colour, and considerable specific gravity, as it sinks rapidly in sul- 

 phuric acid. Its taste Is astringent. It dissolves rapidly in water, 

 and forms a colourless solution, which has sold properties, and 

 which the authov calls oxiodic acid. ibis liquid first reddens 

 vegetable blues, and then d' stroys them. Other colours it converts 

 into yellow. When the cJode is exposed to a lieat raiher below the 

 boiling point of olive oil, it is decomposed, oxvgen gas being 

 driven otf, and iof'ir.e left behind. Sir H. Davy, from various 

 experiments, made however on a small scale, considers ilii* com- 

 pound as composed of one atom of iodine and Kve atoms of oxygen. 

 If we reckon *"iie weight of an atom of iodine 15-621, and that of 

 an atom of oxygen 1, this will give us the oxiode composed of 

 15*621 iodine and 5 oxygen, or of . 



Iodine 75'75 



Oxygen 24*25 



100-00 



Oxiodine has the property of combining with the different basej, 

 and forming oxiodes, which the author describes. The oxiodic 

 acid likewise combines with the alkalies, earths, and oxides, and 

 forms a class of salts, which he distinguishes by the name of 

 oxiodatcs. 



This substance has the remarkable property of combining like- 

 wise with the difl'erent acids, and of forming solid compounds, 

 which for the most part crystallize. When dropped into sulphuric 

 acid, a solid substance falls, which, when heated, melts, and 

 assumes, on cooling, the form of yellow-coloured rhombs. Ac- 

 cording to Sir H. Davy's experiments, this compound is composed 

 of 20 oxiode and 8 sulphuric acid. He considers it as a hydrate. 

 If we suppose it a compound of one integrant particle of oxiode 

 and one integrant particle of sulphuric acid, It appears from the 

 above analysis that there may be present in it two integrant particles 

 of water. The oxiode combines also with phosphoric acid, phos- 

 phorous acid, nitric acid, and oxalic acid. These combinations are 

 l)rol)ably all hydrates. 



The oxiodic acid dissolves gold and platinum. When heated, 

 the water is driven off, and the acid at last remains in the state of a 

 thick paste. This paste is a hydrate of oxiodic acid. Sir H. Davy 

 tried to obtain a compound of oxygen and iodine containing a less 

 proportion of oxygen than the above-dcsciilicd oxiode; but his 

 attempts were unsuccessful. The supposed combination of oxygen 



