To the Honourable 
, Sir Hans Sloane, Baf- M.D. 
Late 
PRESIDENT of the Roy.al Society, a 7 id 
RoyalCollege <^PhyEcians,LoNDON; 
- Firfi PhyEcian to His MAJESTY; 
Member of the Imperial Academy of Sciences 
at ^ r , Petersburgh, 
Fhe Royal Academies ^Sciences 
Paris, Madrid, Berlin, 
And 
Fellow of the Royal College of Phy- 
Ecians at Edinburgh, fePc. 
SIR, 
I CANNOT fufficiently extol that eminent 
Zeal you have fhewn on all Occahons 
for the Promotion of Natural K7iowledge, 
the prefent Perfection of which is greatly in- 
debted to your Labours and Patronage. The, 
, ; . . A noble 
