To the Right Honourable 
William Lord Viscount Brouncker^j 
Chancellor to Her M a ; s s t 
AND 
President to the Royal Socie t Y^e^Te 
Ur LORD^ 
Fter I h^id dedicated the Firft Folumi of the[e Phl- 
kpphical occurrences tothK, Sockty, towhfe 
fervice I have dedicated my felf, 1 thsught it 
mj next duty to prefent the Second to jmr Lord- 
fbip^ who h^vtfor [o many years with fo high and 
universal an Applaufe prefided in that lllu/frious 
Affembly^ and thm given full proof both of the vafl extent of pur 
knmledg^ and the incomparable folidity of your judgment in aA the 
various Jr^^uments and Matters there f reduced, ohfervei^ experi- 
mented and difcourfed of. Thisy my Lord, though it deferves a far 
better Pen to be proclaim'' d to the mrld^ then mine yet did I think^ 
I might be fufferd in this crowd to cafl in my voice^ and to deliver the 
truth and my perfwafion thereof in thefe plain exprefsions. To 
which I jhall add no more but my humble acknowledgments for your 
LorJjlips particular favour andgoodnef^ in condefcending on all oc^ 
eaftonsy to encourage thefe {though rude and undige^ed) Communis 
cations J and thereby tofortifie ( againft the obloquies offome fingular 
men ) the endeavours of the Autheur for the improving arid en- 
Urging his Philojophical Commerce *j which^ being done^ may per- 
haps be a means to render thefe Papers lefs inconftderable for the 
future. I am^ 
MyLotd, 
Your Lordfhips 
L O ^NDON, Very humble, and very much 
March 1.1667 obliged Servant, • 
' ^ Henry Oldenburg. 
Soc. Reg, Seer. 
