T O 
Ifaac Newton, Efq; 
PRESIDE N T5 
A N D T O THE 
Council and Fellows 
O F T H E 
ROYAL SOCIETY 
LGNDON. 
For the Advancement of 
NATURAL KNOWLEDGE! 
This Three and Twentieth Volume 
OF THE 
Philofophical Tranfadions, 
Is humbly Dedicated by 
Their mod Obedient Servant, 
^ Hans Sloane^ S* E« Secx- 
