58 On the new discovered Substance called Iode. 
Take a thin glass tube about 10 or 12 inches long, and 3 -8ths 
of an inch in the bore; put into it about one drachm of the un- 
crystallizable residue before mentioned, previously fused for a 
few minutes, to free it as much as possible from water, and re- 
duced to a coarse powder: add to it, without soiling the mside 
of the tube*, about half its weight of concentrated sulphuric 
acid: shake the whole together, and apply a gentle heat, by 
means of a taper or lamp. This being done, a dense white 
vapour will make its appearance, and a black glistening powder, 
which is iode, become sublimed in the colder part of the tube. 
Then cut to a convenient length, with a file, that part of the 
tube which contains the iede, and seal the extremities of it by 
means of the blow-pipe or spirit-lamp. 
The preparation of iode upon a larger scale is equally simple 
and easy. Let a long slender-necked tubulated retort be placed 
in a sand-bath; surround the whole body of the retort up to the 
tubulure with sand, and adapt, without luting, to the beak of it, 
a wide-mouthed phial or receiver. This being done, introduce 
through the tubulure, first, one part of sulphuric acid, and then 
two parts of the saline mass, before-mentioned, broken into small 
pieces of the size of split pease, and distil for a few minutes 
with a gentle heat. . The iede will become sublimed into the 
neck of the retort in a crystalline form, exhibiting a black shining 
crust. Cut off the neck of the retort witha file, and collect the 
icde by means of a feather or camel’s hair brush. 
If the whole of the saline mass of kelp or barilla, freed from 
carbonate of soda only, and which of course consists of muriate 
of soda, muriate of potash, sulphate of potash, hydrosulphuret of 
potash, &c. be treated with sulphuric acid, the preparation of 
iede becomes more embarrassing aud difficult. 
I have the honour to be, yours, 
Compton Strect, Soho, Freprick Accum. 
XI. Account of the new Substance discovered by M.Courrois, 
and called iopE+. 
"Tue new stibstance to which we may give the name of iode, 
possesses in a high degree the electric properties of oxygen, and 
oxygenated muriatic acid. When it is purified by means of 
potash and distillation, it is infusible at the temperature of boil- 
* This may be done conveniently, by sucking the acid up with the mouth 
into a long small glass tube drawn out to a capillary point, applying the 
finger to the upper orifice of it, and thus transferring by means of it the 
acid into the larger tube. 
+ Translated from the Paris Moniteur of Dec, 12, 1813. 
ing 
