T O 
MARTIN FOLKES, Efq; 
PRESIDENT 
Of the Royal Society of London, 
For improving Natural Knowlege , 
And Member of the Royal Academy of Sciences 
at T A R I S, &c. 
ffi I X, 
T hough the Ro yal Society heard 
with the greateft Concern the Refolution 
taken by their late worthy President, to decline 
being any longer chofen into that Office : As they 
were truly fenlible of the many Services he had 
done them, and ftill gratefully acknowlege the 
Continuance of his Favours : Their Lofs was im- 
mediately made up, and all their Apprehenfions 
removed upon your Acceptance of that Port, in 
which you have fhewn the Society, that you 
make their Wellfare and Profperity the Objed of 
your conftant Care and Application. The great 
Pains you have taken to inlarge their Correfpon- 
dence both at Home and Abroad, the generous 
Encouragement you have given to Perfons en- 
gaged in all the feveral Branches of ufeful Know- 
kg e 
