STUDY I. 73 



ûze, in rcfpect of inftinct, that I am conftrained to 

 believe, Nature has produced as many forts of 

 them, as Ihe has produced animal fpecies to be 

 fubjugated. We crofs the breed of cats, of goats, 

 of fheep, ofhorfes, a thoufand different wa3'S5 and 

 after all our efforts and combinations, we can pro- 

 duce only a few trivial varieties, which deferve, in 

 no refpeét, to be compared with the natural va- 

 rieties of the canine fpecies. 



While fome Philofophers afîign to every fpecies 

 of dog a common origin, others afcribe a diffe- 

 rence of origin to Man. Their fyftem is founded 

 on the variety of fîze and colour in the human fpe- 

 cies ^ but neither colour, nor ftature, are diftinâiive 

 charadlers, in the judgment of all Naturalifts. 

 According to them, colour is merely accidental j 

 fuperior ftature only a greater expanfion of forms. 

 Difference of fpecies arifes from the difference of 

 proportions : now this characterizes that of dogs. 

 The proportions of the human body no where 

 vary; the black colour, within the Tropics, is 

 (imply the effeâ: of the heat of the Sun, which 

 tinges him in proportion as he approaches the line. 

 And it is, as we fliall fee, one of the blefllngs of 

 Nature. His fize is invariably the fame in every 

 age, and in all places, notwithftanding the influ- 

 ence of food and climate, by which other animals 

 î^re fo povyerfully affeded. There are breeds of 



horfes 



