C 140 3 
XI. On the mutual action of sulphuric acid and naphthaline , and 
on a new acid produced. By M. Faraday, F. R. S. Cor- 
responding Member of the Royal Academy of Sciences , &c. &c. 
Communicated January 12, 1826. 
Read February 16, 1826. 
In a Paper on new compounds of carbon and hydrogen , lately 
honoured by the Royal Society with a place in the Philoso- 
phical Transactions, I had occasion briefly to notice, the 
peculiar action exerted on certain of those compounds by 
sulphuric acid. During my attempts to ascertain more 
minutely the general nature of this action, I was led to sus- 
pect the occasional combination of the hydro-carbonaceous 
matter with the acid, and even its entrance into the constitu- 
tion of the salts, which the acid afterwards formed with bases. 
Although this opinion proved incorrect, relative to the pecu- 
liar hydro-carbons forming the subject of that Paper, yet it 
led to experiments upon analogous bodies, and amongst 
others, upon naphthaline, which terminated in the production 
of the new acid body and salts now to be described. 
Some of the results obtained by the use of the oil gas 
products are very peculiar. If, when completed, I find them 
sufficiently interesting, I shall think it my duty to place 
them before the Royal Society, as explicatory of that action 
of sulphuric acid which was briefly noticed in my last Paper. 
Most authors who have had occasion to describe naph- 
thaline, have noticed its habitudes with sulphuric acid. 
