SckfUific InteU'igence. — Zoology. 181 



ZOOLOGY. 



4. Comparative Temperature (^ Whites aiul Negroes. — In* 

 a manuscript memoir on his voyage to Central Africa, presented 

 to the Academy of Sciences by M. Douville, he has mentioned 

 some experiments on the difference which exists between the 

 temperature of these two races, according to age, sex, &c. These 

 experiments, although in some points imperfect, are, in many, 

 highly interesting. The researches were made in Africa. M. 

 Douville ascertained the temperature of a number of persons at 

 7 o'cl(x;k A. M., before they had been exposed to the sun. Some 

 of the results follow : 



•1. A White, 



4. A Negro, 

 ' -hi A White Woman, 



. - 6t A Negress, 



Whence results, that, cce 



aged 12 years, = 294" Reaumur. 



[JL A Negro, 12 ... =31^ 



'3, A White, 20 ... =29 



... 20 ... = 31, 



... 14 ... =291 



... 14 ... =32i 



teris paribus^ the Negro possesses more^ 

 aninial heat than the white. M. Douville considers that thehe 

 is a relation also between the development of heat and of the in- 

 tellect. Thus the temperature of 



1. A stupid, slothful Negro, aged 18 years, =29}^* Reaumur. 



2. A lazy Negro, . . ... 18 ... = 29V'5 

 .3f An intelligent Negro, ... 18 ... = 29>2 



4. An active and intelligent Negro, ... 18 ... = 29x'5 



As the passions of the Negro cool with age, he loses a great 

 deal of this excessive heat. He grows old very soon, and at 

 thirty is as aged as a European at fifty-five or sixty years. It 

 is rare to meet a Negro older than forty years; but still the old 

 Negro has a higher temperature than the white in his prime of 

 life*. It results from the researches of M. Douville, that the 

 temperature of the Negro is, cctteris paribus, much superior to 

 that of the white; that the heat of Negresses is greater than that 

 of Negroes up to the fifteenth year of their age, but after that 

 period less, but still greater than that of whites; that the Ne- 

 groes diminish in temperature as they grow old ; and, finally, 

 that the old Negroes have a still higher temperature than "Ihe 

 whites. '■ ' jA 



