1815.) On Todine. 127 
decomposed by heat, give out about 38°88 of oxygen, and that 
there remain 61°12 of what has been considered as neutral muriate 
of potash; but which is, in fact, chloruret of potassium. From 
the proportions given above, the 61:12 contain 28924 chlorine, 
and 32°196 potassium. Now this quantity of potassium would 
take 6°576 of oxygen to convert it into potash. There remain, of 
consequence, 38°88 — 6°576 = 32°304 for the 28:924 of chlo- 
rine ; hence the acid which I suppose to exist in hyper-oxymuriaie 
.of potash must be composed of 
UMIEIMNE! 6 «ssa ats a baw aye -sicie’e’ ao otter oT ate 
MIE as a nt cote alk chick eM 5 hs IE 111-68 
and the oxygen will be to the chlorine in a preportion five times 
greater than that which I have already given. It deserves attention 
that the proportion in weight of the potassium in the chloruret, 
ioduret, and sulpharet, is nearly the same as that of the oxygen 
in the chloric, iodic, and sulphuric acids. 
According to Davy euchlorine gas contains one volume of chlo- 
rine and half a volume of oxygen; and taking 2°421 for the spe- 
cifie gravity of chlorine, we find that euchlorine is composed by 
weight of 
HGre PS Ste OS Pe 100 
iN RD de lead IRE Lae OE EE Pe alae ow hg 
This last number, multiplied by 5, gives 113°95, and though it 
differs from 111°68, we may, notwithstanding, conclude, that the 
acid existing in the hyper-oxymuriates, which I shall henceforth 
call chloric acid, contains five times as much oxygen as euchlorine 
as. 
If we dissolve chloruret of potassium (composed of 100 chlorine 
and 111°31 potassium) in water, and suppose that the water is de- 
composed, we will have hydro-chlorate of potash, admitting the 
oxygen to combine with the potassium and the hydrogen with the 
chlorine. But if we suppose the oxygen to unite with the chlorine, 
we form exactly euchlorine gas. I consider this gas formed by the 
combination of two parts in volume of chlorine and one of oxygen, 
as analogous to the protoxide of azote, which contains two volumes 
of azote and one of oxygen. Hence I propose to distinguish it by 
‘the name of oxide of chlorine. We may likewise distinguish by 
the names of oxide of sulphur and oxide of iodine, combinations 
of sulphur and iodine with oxygen, in the same proportions in 
volume. ‘The first gives by weight about 10 oxygen and 20 sul- 
phur; the second 10 oxygen and 15621 iodine. I think it very 
probable that chlorous and iodous acids exist analogous to the sul- 
phurous and nitrous, which ought to be composed of one volume 
of chlorine or vapour of iodine, and 1*5 of oxygen. 
Itappears to me demonstrated from the quantity of oxygen in 
oxide of chlorine, that this oxide does not exist in the hyper- 
oxymuriates, Davy, however, is of a different opinion, for he 
3 
