1821.] On a new Compound of Chlorine and Carbon. 53 



combustion which is in combination, the terms of hydrocar- 

 buret of chlorine and hydrocarburet of iodine may be con- 

 sidered as appropriate for them. 



As yet, I have not succeeded in procuring an iodide of carbon, 

 but I intend to pursue these experiments in a brighter season 

 of the year, and expect to obtain this compound. 



On a new Compound of Chlorine and Carbon. 

 By PHILLIPS and FARADAY*. 



[Read July 12, 1821.] 



M. JULIN, of Abo in Finland, is proprietor of a manufactory, 

 in which nitric acid is prepared by distilling calcined sulphate 

 of iron with crude nitre in iron retorts, and collecting the pro- 

 ducts in receivers connected by glass tubes, in the manner of 

 Woulfe's apparatus. In this process he observed, that when a 

 peculiar kind of calcined vitriol, obtained from the waters of 

 the mine of Fahlun, and containing a small portion of pyrites, 

 known in Sweden by the name of calcined aquafortis vitriol 

 No. 3, was used, the first tube was lined with sulphur, and the 

 second with fine white feathery crystals. These were in very 

 small quantity, amounting only to a few grains from each distil- 

 lation ; but M. Julin, by degrees, collected a portion of it, and, 

 having brought it to this country, inserted a short account of 

 its properties in the 'Annals of Philosophy,' vol. i. p. 216, to 

 which a few observations were added by ourselves. 



The following are the properties of this substance, as de- 

 scribed by M. Julin. It is white ; consists of small soft ad- 

 hesive fibres ; sinks slowly in water ; is insoluble in it whether 

 hot or cold ; is tasteless ; has a peculiar smell, somewhat 

 resembling 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 por- 

 tion of sulphur dissolved from it ; dissolves in hot oil of turpen- 

 tine, 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 



* Phil. Trans. 1821, p. 392, and Phil. Mag. lix. p. 33. 



