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V. An Account of some new Experiments on the fluoric Compounds ; 
with some Observations on other Objects of Chemical Inquiry. 
By Sir H. Davy, LL. D. F. R. S. V. P. R. L 
Read February 13, 1814. 
In this Paper I shall offer to the Society a continuation of those 
researches, the details of which have been already honoured 
with a place in their Transactions ; and I trust, that the ex- 
periments and observations which I have to communicate, will 
be found to elucidate some important but obscure parts of 
chemical philosophy. 
In the last Paper, which I had the honour of presenting to 
this Body, I have given an account of a number of experi- 
ments made with a view of decomposing the fluoric acid: the 
most probable inference, from my results, was that the pure 
liquid fluoric acid consists of hydrogen united to a substance, 
which, from its strong powers of combination, has not as yet 
been procured in a separate form, but which is detached from 
hydrogen by metals, and which, in union with the basis of the 
boracic acid and silica, forms the fluo-boric and silicated fluoric 
gases. 
All the new experiments, that I have made on the fluoric 
compounds, tend to confirm this idea ; and the various attempts 
that I have made, since the last session, to decompose the 
principle in the fluoric acid separated at the negative surface 
in Voltaic combinations, have been unsuccessful. 
I have found that fluate of lead, the substance formed by 
