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Quadrupeds, and Birds; and this we find to be fa<5l, not only 

 in external appearance, but alfo in internal conformation, 

 though the latter is noticed only by the curious — for inftance, 

 anirpals which with us have four flomachs, have in Africa 

 only two ; the reafon we guefs to be, becaufe the African 

 grafs is more fucculent, and fooner gives out its nutritive 

 particles than ours, confequently requires lefs compreffion, 

 and preparation, which is the office of thefe flomachs. In 

 external form, very ftrange changes occur : fowls fent from 

 Europe to Virginia^ quickly lofe their rumps, and by this lofs 

 become as it were met amor phojed : nor need we go fo far for 

 proofs ; it is well known, our bull- dogs degenerate on the con- 

 tinent, and no art can maintain their race in perfection ; fo 

 do our fheep. If in the fame latitudes this occurs, no wonder 

 difference of latitude fhould have great efFedl : creatures which 

 require an ardent fun mufl be very much enfeebled in nor- 

 thern climates. This is happy for us ; efpecially, if it be 

 true, that we have in our own country moft of thofe veno- 

 mous infedts (if not the reptiles) which beneath the Equator 

 are fo mifchievous, and deadly; but with us they are fo 

 weak and diminutive, that they require the njicrofcope to 

 afcertain them. Our fnakes are doubtlefs of the fame nature 

 as equatorial ferpents, but of how different powers I how 

 feeble their hifs ! how diminifhed their terrors ! Larger 

 animals (as the horfe) preferve more of their native pro- 

 perties, and manners, though they vary in fize and flrength i 

 but no creature is capable of inhabiting the globe at large, 

 o|.^occupying diftant and contradidlory climates, like man, 

 ••-r. ';: '" ■•-*-"i' who 



