To the Right Honourable 
. v _ ^ . ' _ , "i ■• 
William Lord Viscount Brouncker, 
Chancellor to Her Majesty, 
AND 
RESIDENT tO the R O YAL SoCIET Y y &'C. 
M T LORD , 
Ft er I had dedicated, the Firft Volume of thefe Phi- 
lojophical Qccurrencestothe R.Society, to whofe 
fervice I have dedicated my felf 5 1 thought tt 
my next duty to prefect the Second to your Lord - 
Ship , who have for [o many tears with fo high and 
univerfal an Applaufe prefided in that lllu firms 
and there given full proof both of the vafi extent of your 
knowledge and the incomparable [olidity of your judgment in ad the 
various Arguments and Matters there produced , obferved , expert - 
mented and difcourjed of. This, my Lord, though it deferves a far 
better Pen to be proclaimed to the worlds then mine 5 yet did I think, 
/ might be fufferd in this crowd to cafi in my voice , and to deliver the 
truth and my perfwafion thereof in thefe plain exprefsions . To 
which 1 fhall add no more but my humble acknowledgments for your 
Lordjhips particular favour and goodnef, in condefcending on all ec- 
cafions, to encourage thefe {though rude and undige fled) Communi- 
cations, and thereby to fortifie (” againfl the obloquies of feme fingular 
men ) the endeavours of the Authour for the improving and en- 
larging his Philofophical Commerce 5 which 5 being done , may per- 
haps be a means to render thefe Papers left inconsiderable for the 
r ' J I am^ 
My Lord 3 
* . . . . ''E , 
Your Lordfhips 
Very humble, and very much 
obliged Servant/ * 
LON DON, 
March 2 . i66y 
Henry Oldenburg , 
Soc, Reg. Seer. 
