A N 



ACCOUNT 



OF THE 



OBSERVATIONS 



Upon which this 



DISCOURSE 



Is Founded. 



FR O M a long train of Experi- 

 ence, the World is at length 

 convinced , that Obftrvations 

 are the only fure Grounds 

 whereon to build a lafting and fub- 

 ftantial Philofophy, All Parties are 

 fb far agreed upon this matter, that 

 it feems to be now the common fenfe 

 of Mankind. 



For which reafbn, I fhali in the 

 Work before roe, give my felf up to 



B be 



