COMPOUND OF CARBONIC OXIDE AND OXIMURIATIC GAS. Q^J 



nifies formed by light; and as yet no other mode of producing 

 it has been discovered. 



I have exposed mixtures consisting of different proportions Oximuriatic 



of chlorine and carbonic acid to ls^ht, but have obtained no and carbonic 



° acid gcisses will 



new compound. not combine. 



The proportions in which bodies combine appear to be de- Relative pro- 



termined by fixed laws, which are exemplified in a varietv P oruons °/ 

 J . r - compounds, 



of instances, and particularly in the present compound. Oxi- 



gen combines with twice its volume of hidrogen and twice 

 its volume of carbonic oxide to form water and carbonic acid, 

 and with half its volume of chlorine to form euchlorine; and 

 chlorine reciprocally requires its own volume of hidrogen 

 and its own volume of carbonic oxide to form muriatic acid 

 and the new gas. 



This relation of proportions is one of the most beautiful 

 parts of chemical philosophy, and that which promises fairest, 

 when prosecuted, of raising chemistry to the state and cer- 

 tainty of a mathematical science. 



II. 



A Narrative of the Eruption of a Volcano in the Sea off the 

 Island of St. Michael. By S. Tillard, Esq. Captain in 

 the Royal Navy. Communicated by the Right Hon. Sir 

 Joseph Banks, Bart. K. B. P. R. S* 



APPROACHING the island of St. Michael's, on Sun- Smoke seen 



day the 12th of June, 1811, in his majesty's sloop Sabrina, ascending from 



under my command, we occasionally observed, rising in the 



horizon, two or three columns of smoke, such as would 



have been occasioned by an action between two ships, to 



which cause we universally attributed its origin. This 



opinion was, however, in a very short time changed, from 



the smoke increasing and ascending in much larger bodies 



than could possibly have been produced by such an event ; 



and having heard an account prior to our sailing from Lisbon, 



that in the preceding January or February a volcano had arising from a 



volcano. 



Philos. Trans, for 1812, p. 152. 



burst 



