210 Experiments on the Action of Iodine 
desirous of ascertaining how far the iodine in the compound was 
connected with those effects, I filled the spoon with turpentine 
and put it into a fresh bottle of chlorine, when ebullition immne- 
diately took place, and was succeeded by the inflammation and 
decomposition of the oil. 
2. Action of Iodine on other volatile and fixed Oils, Sc. 
The effects of iodine on oil of lavender are similar to those 
already noticed respecting turpentine. When iodine is brought 
in contact with the oil of lavender, a strong action takes place, 
heat is evolved, and a dark reddish-yellow solution is formed. 
Analogous results are afforded with iodine and the oils of cara- 
way, peppermint, and origanum ; but the action of iodine on 
these oils is more feeble than on those of turpentine and laven- 
der, and it is stronger on the oil of caraway, than on the oils 
of peppermint and origanum. Oil of amber acts very feebly on 
iodine, anda solution of a reddish-yellow colour is slowly formed. 
Iodine is soluble.in naphtha, and to a certain extent in olive oil 
and oil of ivy. 
Fixed vegetable oils and animal oils have very little action ou 
iodine. When put into rape oil, iodine does not dissolve ; it be- 
comes brown by a gentle heat, and acts slightly on the oil. The 
effects of hemp, linseed, olive, and castor oils, are very similar to 
those of rape oil. Those oils in general separate iodine from 
its solution in water, but the action of iodine upon them, and 
also upon spermaceti and pilchard oils, is very slight. 
Iodine readily combines with camphor by a gentle heat, and 
a dark-brown soft solid compound is formed, which is deliques- 
cent, soluble in water, but more soluble in alcohol or turpentine. 
When turpentine is added to the aqueous solution of iodine and 
camphor, it separates the compound and leaves the water colour- 
less. On adding alcohol, the camphor is separated, whilst the 
iodine remains dissolved in the turpentine. ¢ 
Resin unites with iodine by a gentle heat, and a dark brown 
compound is formed, which is soluble in alcohol. | Turpentine 
separates the iodine, and water the resin. 
3. Observations, ec. 
From the foregoing experiments, &c. it seems that iodine ex- 
erts a strong action on volatile oils, and especially upon turpen- 
tine and lavender; but on fixed oils its effects are much less 
considerable. In general, both the volatile and fixed oils se- 
parate iodine from its solution in water.. The action of iodine 
on volatile and fixed oils resembles that of chlorine on these bo- 
dies, a circumstance which serves to extend the analogies which 
Sir Humphry Davy has traced between iodine and chlorine in 
their 
