[ 3 92 3 
XXVII. On a new compound of Chlorine and Carbon. By 
Richard Phillips, F. R. S. E. F. L. S. M. G. S. &c. and 
Michael Faraday, Chemical Assistant in the Royal Insti- 
tution. Communicated by Sir Humphry Davy, Bart . P. R.S. 
Read July 12, 1821. 
M. Julin, of Abo, in Finland, is proprietor of a manufac- 
tory in which nitric acid is prepared, by distilling calcined 
sulphate of iron with crude nitre in iron retorts, and collecting 
the products in receivers connected by glass tubes, in the man- 
ner 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 distillation ; but M. Julin, by degrees, collected a por- 
tion 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 
