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HE prefent performance has undergone fb many changes m 

 its form lince my return from my voyage, that the pubh'c 



will excufe my delay in publifhing it, and fome of my friends, 



will I flatter myfelf, be able to judge, what confiderable improve- 

 ments it has received both from their friendly flridlures, and my 

 own meditation and reading. The fubjecfb I have treated is fo varied^ 



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that I have been obliged to have recourfe in many points to the 

 Sages of every age : and I have either been intruded by them, 



'^ations, or obliged to diffent 



or led by their hints to fome new obfcrvations, or 



from their opinions. In regard to the Phyfical Geography of 



our Globe I am much indebted to the Count de Buffon, and 



r 

 'H- ■. 



to the ingenious Chevalier Torbern Bergman ^ in regard to the 

 Philofophical Hiftory of the Human Species, I have been often, 

 delighted with the ideas of that excellent Philofopher of Balle 



Mr. JSAAC ISELIN. 



And the works of Dr. Blumenbach and 



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Dr 



