t 384 1 
XXXVni. An Account of further Dlfcoveries in Air, By 
the Rev. Jofepli Prieftley, LL.D. F. R. S. in Fetters to 
Sir John Pringle, Bart. P. R. S. and the Rev. Dr, 
Price, F. R. S. 
LETTER L 
TO SIR JOHN- PRINGLE, BART. P. R. S. 
DEAR SIR, March 15, 1775. 
Redde, May 25, f f AVING been pretty fortunate in the 
profecution of my experiments on dif- 
ferent kinds of air, hnce the publication of my treatife 
on that fubjedt, I think it due to the attention with which 
you have from the firlt honoured them, to give you fome 
account of what I have lately done. I know that every 
new difcovery, in any branch of natural knowledge, 
gives you pleafure ; and it is peculiarly flattering to me, 
that you conflder fome of thofe, wdrichlhave been happy 
enough to make, in a light of fome importance. As I 
have materials enough, for another feparate publication, I 
fliall not trouble the Society with a particular account of 
my obfervations ; but if you think proper to communicate 
to them the following very general account, as a mark 
of my refpedl for the Society, as well as for yourfelf, you 
I ’ will 
