T O 
ROGER GALE, Efq; 
Vice-President andTREASURER 
O F T H E 
ROYAL SOCIETY 
O F 
LONDON, 
F O R 
Promoting Natural Knowledge, 
This Thirty -Eighth V o l u me of 
Is humbly Dedicated by 
His moft obedient, and 
Mofi humble Servant j, 
Cromwell Mortimer, R.S.Secr. 
