DEDICATION. 



mental Science therein, but late, in 

 comparifon of the age of the World ; 

 It is no wonder that many Errors 

 thro' a fpeculative inadvertency, and 

 a rehance on defcdive Hypothefes 

 only, in Natural Philofophy, have 

 been received by Mankind and even 

 attained an EftabHftiment by the au- 

 thority of Great Names : Which 

 feverally in their Turns, have occa- 

 fionally hoodwink'd Reafon, blinded 

 the Senfes of, and at laft left all their 

 Followers in the dark. 



On thefe Confiderations, my own 

 Senfe, and dear bought Knowledge 

 thereof on the Point depending, a 

 Natural concern for others Welfare 

 in the like cafe, and withal the 



great 



