T O 
Sir Ifaac Newton, K* 
PRESIDENT, 
And to the 
C)ouncil and Fellows 
OF THE 
Royal Society 
O F 
LONDON, 
, FOR T'H E 
Advancement of Statural K^otpledge 
THIS 
Twenty Sixth VOLUME 
O F T H E 
Philofophical T ranfaftions 
r s 
HUMBLY DEDICATED 
' / 
B Y 
Hans SloanCy R. S. Seer, 
• r 
