My Lord,

fter I had dedicated the First Volume of these Philosophical Occurrences to the R. Society, to whose service I have dedicated my self, I thought it my next duty to present the Second to your Lordship, who have for so many years with so high and universal an Applause presided in that Illustrious Assembly, and there given full proof both of the vast extent of your knowledg, and the incomparable solidity of your judgment in all the various Arguments and Matters there produced, observed, experimented and discoursed of. This, my Lord, though it deserves a far better Pen to be proclaim'd to the world, then mine; yet did I think, I might be suffer'd in the crowd to cast in my voice, and to deliver the truth and my perswasion thereof in thefe plain expressions. To which I shall add no more but my humble acknowledgments for your Lordships particular favour and goodness, in condescending on all occasions, to encourage these (though rude and undigested) Communications, and thereby to fortifie (against the obloquies of some singular men) the endeavours of the Authour for the improving and enlarging his Philosophical Commerce; which, being done, may perhaps be a means to render these Papers less inconsiderable for the future.

I am,

My Lord,

Your Lordships

London.
March 2, 1667
8

Very humble, and very much

obliged Servant,

Henry Oldenburg.

Soc. Reg. Secr.