THE HUMAN SPECIES. 181 



woolly-haired acquire the Caucasian expression of beauty from 

 a first intermixture, and very often both stature and form ex- 

 ceeding either type; and, in the second generation, the eyes of 

 Mongoles become horizontal, the face oval. The crania of the 

 Negro stock immediately expand in their hybrid offspring, and 

 leave more durable impressions than when the order is reversed. 

 Even from the moment either typical stock is itself in a posi- 

 tion to be intellectually excited by education, it is progressive 

 in development in succeeding generations. Here, then, at the 

 point of most intense innervation, the spark of indefinite 

 progress is alone excited, and communicated in power, pre- 

 cisely according to the quantity received. For the rest, gesta- 

 tion, puberty, and duration of life, exclusive of accidental 

 causes, are the same ; and in topographical location, though 

 each is possessed of a centre of vitality, yet all have races and 

 tribes scattered in certain directions through each other, and to 

 vast distances, at the very first dawn of historical investigation. 

 This may be the cause why all nations acknowledge a great 

 deluge, although they do not foresee a second; but almost as 

 universally expect a conflagration. It is, however, true, that 

 the obvious inference to be drawn from the foregoing remarks, 

 does not amount to a demonstration that mankind sprung from 

 a single pair, or is of one species only, since there are numer- 

 ous proofs, notwithstanding a permanent divergence, of the 

 three types having been constantly in sufficient contact to 

 learn great general traditions ; and the diluvian fact itself was 

 of such magnitude, that it may have been actually witnessed 

 by all. But then, the intention of an aboriginal unity of the 

 species is at least so far indicated by the circumstance of 

 Man's typical stock, having all a direct tendency to pass 

 upwards towards the highest endowed, rather than to a lower 

 condition, or to remain stationary. 



However, these remarks appertain solely to the traditional, 

 geographical, and historical considerations, leaving untouched 

 the structural phenomena, which the physiologist must weigh 

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