3t To the Honourable 

 ^AMUEL MoLYNEUX Efqt» 



SECRETARY 



T O 



His Royal Highnefs 



..THE 



Prince of WA L E S, 



and F. R: S. 



THIS 



COLLECTION 



O F 



Philofophical Letters 



Is humbly Dedicated 

 By His 



Moji Obliged* 

 Humble Servant, 



W. Derham, 



