To the Right Honourable 
yOHNLordSOMMERS, 
Prefident of the 
ROYAL SOCIETY 
L O N D O N. 
F O R T H E 
NATURAL KNOWLEDGE, 
This Two and Twentieth Volume 
0 F T H E 
PHILOSOPHICAL TRANSAC TIONS 
Is humbly Dedicated by 
HisLordfhips 
moft Obedient Servant, 
Hans Sloane, S.R. Secr^ 
