Messrs. Phillips and Faraday on a new compound, & c . 393 
hot or cold ; is tasteless ; has a peculiar smell, somewhat re- 
sembling spermaceti ; is not acted on by sulphuric, muriatic, 
or nitric acid, except that the latter by boiling on it gives 
traces of sulphuric acid ; boiled with caustic potash, has a small 
portion of sulphur dissolved from it ; dissolves in hot oil of 
turpentine, but most of it crystallizes in needles from the 
solution on cooling ; dissolves in boiling alcohol of .816, but 
by far the greater part crystallizes on cooling ; burns in the 
flame of a lamp with a greenish blue flame, giving a slight 
smell of chlorine gas ; when heated, melting, boiling and 
subliming at a temperature between 350° and 400°, and sub- 
liming slowly without melting at a heat of about 250°, forming 
long needles. Potassium burned with a vivid flame in its vapour 
in an open tube, and carbon was deposited ; a solution made 
of the residuum, and saturated with nitric acid, gave a copious 
precipitate with nitrate of silver. M. Julin then remarks, that 
the small quantity he possessed, with want of leisure, pre- 
vented him from making any farther experiments on it ; and 
concludes, by comparing it with the chlorides of carbon that 
have lately been formed. 
The small quantity of the substance which, by the kindness 
of M. Julin, we had at our disposal at that time, was insuf- 
ficient to enable us satisfactorily to ascertain its nature. We 
found it mixed with free sulphur, and sulphate and muriate 
of ammonia. When purified, our first object, in consequence 
of M. Julin’s suggestion, was to compare it with the per-chlo- 
ride of carbon, but it was found entirely distinct from it in its 
properties. 
Since M. Julin's return from the continent, he has very 
kindly placed some farther portions of this substance at our 
