34 On a new Compound 
boiling alcohol of 816, but by far the greater part crystallizes on 
cooling ; burns in the fae 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 subliming 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 co- 
pious 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 further 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 insufficient 
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-chloride of carbon, 
but it was found entirely distinct from it in its properties. 
Since M. Julin’s return froin the continent, he has very kindly 
placed some further portions of this substance at our disposal. 
We have therefore been enabled to continue our experiments, 
and have come to the very unexpected conclusion of its being 
another chloride of carbon, in addition to the two, an account 
of which has been published in the Transactions of the Royal 
Society for this year. 
The substance, after being boiled in solution of potash, washed 
in water, dried and sublimed, formed beautiful acicular crystals, 
which appeared to Mr. W. Phillips to be four-sided prisms. They 
contained no sulphur, and, when dissolved in alcohol or ether, 
gave no traces of chlorine or muriates, by nitrate of silver. They 
burned in the air with a strong bright flame at a heat below red- 
ness, and agreed with the description given by M. Julin of the 
properties ef the substance. 
When heated moderately, it sublimed unaltered; but on pass- 
ing a portion over rock crystal, heated to bright ‘redness, ina 
green glass tube, it was decomposed, charcoal was deposited, and 
the gas, passed inte solution of nitrate of silver, precipitated it, 
and proved to be chlorine. 
A portion was repeatedly sublimed in a small retort filled with 
chlorine, which was made red hot in several places; it however 
underwent no change: but on cooling crystallized as at first. It 
was also exposed in the same gas to sun light for many days, 
but no change took place. 
When 
