146 Ou the Camphoric Acid, 
tion of soap. To obtain the iode from the waste lee, let it be 
boiled for a few minutes with quicklime; strain. the fluid, and 
mingle it witl sulphuric acid in excess. This being done, eva~ 
porate the fluid to a syrupy consistence, and then distill or 
heat it in a flask as directed above with red oxide of lead and sul- 
phuric acid. The iode will thus be obtamed in abundance ; and 
this in fact forms the cheapest process of obtaining it. If the 
waste lee contains much animal matter, soap, &c. it then is es- 
sential that they should be first destroyed by exposure to a mo- 
derate red heat. : 
Before I conclude this paper, I beg leave to state, that I have 
reason to believe that iode does not exist in barilla; although: 
I spoke otherwise in my former letter. The kelp upon which f 
operated, being delivered to me under the name of a sample of 
barilla, was the cause of the deception: into which I was led on 
that occasion. Indeed, there exists much confusion in the mar- 
ket between the articles of kelp and barilla. The latter is fre- 
quently adulterated er mixed with kelp m so dexterous a manner, 
that even the most skilful dealers in these commodities are ofter 
deceived. Those who have an opportunity of readily rendering 
the lixivium of kelp caustic, in the usual manner by quicklime, 
will do well so todo. The obtained salt, containing the iode, 
when then distilled with sulphuric acid and red oxide of lead, does 
not effervesce, and the distillatory vessels employed for that pur~ 
pose may be of a less capacity. 
I um, with respect, yours, 
‘ FREDRICK Accum. 
Messrs. Nicholson and Tilloch. 
—— ———— 
XXIX. On the Camphorie Acid, considered as a peculiar Acids 
By M. Bucuoxz*. 
M. Bucno1z, after having referred to the different memoirs 
which have appeared on the subject of the camphoric acid since 
the discovery of Kosegarten to that of M. Bouillon-Lagrange, has 
thought it his duty to publish his own observations on the sub- 
ject. 
The method of proceeding which appeared to M. Bucholz to 
be the best adapted for avoiding loss, consisted im treating two 
ounces of camphor with a pound and a half of nitric acid of the 
specific gravity of 1:250, to which he adds half a pound of pure 
nitric acid of the specifie gravity of 1-550, rectifying the whole 
three times successively by-employing a middling degree of heat, 
and taking away about half the liquor every time, or the quantity 
which is necessary that the whole of the camphor might be con- 
* Annales de Chimie, tome Ixxxiv. p. 301. 
‘ verted 
