C i°8 3 
VI. On some combinations of Platinum. By Edmund Davy, 
Esq. Professor of Chemistry, and Secretary to the Cork Institu- 
tion. Communicated by F. Babington, M. D. F. R. S. 
Read February 17, 1820. 
In my communication to Sir H. Davy, Bart, “ On anew ful- 
minating platinum,” which has been honoured with a place in 
the Transactions of the Royal Society,* I stated, that I had ob- 
tained some other new compounds of this metal : these have 
since occupied no inconsiderable portion of my leisure hours, 
and I now beg leave to lay the results of my inquiry before 
the Royal Society. A constant attention to other necessary 
duties, has not allowed me sufficient time to render this inves- 
tigation so complete as I could have wished ; but as I pre- 
sume the facts are novel, I shall venture to bring them for- 
ward in a form, which, though imperfect, may not be wholly 
destitute of interest. 
I. On a peculiar compou?id of platinum, obtained from sulphate of 
platinum, by the agency of alcohol. 
Sulphate of platinum, unlike the other metallic sulphates 
in general, is, to a considerable extent, soluble in alcohol and 
in ether ; as these fluids are capable, in certain circumstances, 
of partially or wholly reviving some metallic oxides from 
their solutions in acids, I wished to try their effects on the 
sulphate of platinum. Accordingly, I put into a small phial 
* Phil, Trans. 1817. 
