THE HUMAN SPECIES. 129 



All, however, appear to have taken but slight notice 

 of numerous races of the several forms of Man, which 

 have been entirely extinguished, and to have assumed, 

 for incontrovertible, that the structural differences 

 observable in nations are solely the result of changes 

 of climate, food, and other conditions of existence, 

 which a careful attention to history does not confirm ; 

 and which, if they operated at all, must be a result of 

 the long continued action of the same causes upon the 

 portions of mankind placed within the sphere of tiieir 

 operation ; such as arid or moist tropical heat ; arctic 

 cold ; open mountain ridges, or low swampy forests : 

 ye*t, there is so little certainty, that such causes do or 

 would effect the modifications ascribed to them, that it 

 is not even proved they influence the brute creation to 

 any extent, except in clothing ; and the three normal 

 forms of Man, in every region which is sufficiently 

 genial to sustain the persisting duration of one of them, 

 feel the effect but slightly ; and as there are only three 

 who attain this typical standard, we have in them 

 the foundation of that number being exclusively 

 aboriginal. 



This inference is further supported by facts, which 

 show, if not a succession of distinct creations of human 



and many more. Those who wish to view the abstract 

 form of the classifications of Man, zoologically considered, 

 will find an interesting article in the Edinburgh Journal of 

 Physical Sciences, by William Macgillivray, fol. vol. i. ; 

 and in the Animal Kingdom, commenced by Linnaeus 

 Martin ; two works, which, it is to be regretted, were dis- 

 continued from want of public support. 



I 



