DEDICATION. 
larly to Patronize this Forty-jirjl Volume of 
the Philofophical TranfaSHons^ which ends 
with the laft Year of your Prefidentfhip. I 
remain, 
Honoured S I R, 
Dartmouth - fireet , 
WESTMINSTER^ 
Dec . 31. 1741. 
Tour 7nuch devoted 
and obliged 
Hwnble Servant.^ 
Cromwell Mortimer,'/!/. Z). 
Secretary to the Royal Society, and 
Fellow of the Royal College of 
Physicians LONDON 
