GENERAL OBSERVATIONS. 15 



that their offspring and their descendants will be as prolific 

 as if they were of a pure race, whilst the second as firmly sus- 

 tains that no mixed race can have any other but an ephemeral 

 existence. 



Between these opposite assertions we may well ask where 

 lies the truth ? Facts must answer the question. We shall 

 endeavour to examine a few. Some of the facts are in favour 

 of the monogenists, others support the opinion of their adver- 

 saries, from which we shall be enabled to infer that in the genus 

 homo, as in the genera of their mammalia, there are different 

 degrees of homosogenesis, according to the races or species ; 

 that the cross-breeds of certain races are perfectly eugenesic ; 

 that others occupy a less elevated position in the series of hy- 

 bridity ; and finally, that there are human races the homoeo- 

 genesis of which is still so obscui'e, that the results even of the 

 first intermixture are still doubtful. 



