504 H. Dawy*s further Experiments 
It is evident from this experiment, that SLilphur, iodine, and 
hydrogene, are capable of forming a triple compound. 
2. I sublimed some iodine in dry olefiant gas ; a little of a 
reddish brown fluid was formed, but the greatest part of the 
iodine crystallised on the sides of the vessel in which the ex- 
periment was made. By repeating the process several times, 
more of the fluid was formed. It was volatile at a moderate 
heat, and gave a yellow tint to water, but did not render it 
acid, there was a very slight absorption of the gas. 
3. Iodine sublimed in nitrous gas effected no change in it. 
4. When iodine was exposed to carbonic oxide it underwent 
no change, it was repeatedly sublimed in it in common day 
light without undergoing the slightest alteration. 
When the violet gas was formed by heating iodine in car- 
bonic oxide, and the vessel exposed for some time to the direct 
solar rays, a small quantity of a limpid fluid which had an acrid 
taste formed in the vessel. An accident prevented me from 
ascertaining if any gas had been absorbed, but it seems pro- 
bable from this result that, like chlorine, iodine may be com- 
bined with carbonic oxide by the agency of light. 
5. On the mode of detecting Iodine in combinations ^ and on certain 
properties of its compound with Sodium. 
1. I have examined many of the marine productions of the 
Mediterranean, with the view of determining whether they 
contained iodine. The ashes of the fuci and ulvse of this sea 
afford it in much smaller quantities than the sel de varec, and 
in a very few cases only have I been able to obtain evidences 
of its existence in them. 
