CONSANGUINEOUS MARRIAGES 253 
These differences are correlated with differences in the number of 
respirations per minute which are as follows: whites 16.4, negroes 
17.7 and mulattoes 19. Gould gives results on cranial measure- 
ments as follows: circumference of head, 22.1 in. in whites, 21.9 in 
negroes, 22.0 in mulattoes. Dr. S. B. Hunt ! has shown that the 
weight of the brain in the mulatto increases with the proportion 
of white blood in his composition. The mulattoes less than half 
white have, on the average, a less brain weight than the pure 
negro. The results are shown in the following table: 
Brain Weights of Mulattoes 
No. of Cases Degrees of Color Weight of Brain 
DA sip leap a geek rhs hwo aA white 1,475 gm. 
Bigedt a ieen telah a ieeres cote ae a 1,390 “ 
1 Re ee eee eee a 1,334 “ 
[eee eee ee ny ae ee We 1,319 “ 
QS Roce one on eras cuits. 7 1,308 “ 
BD Pe eaten Nic meee tees a 1,280 “ 
The figure for the brain weight in whites based on 278 other 
cases is 1,403 gm. Results confirmatory of these findings have 
been reported also by Topinard. 
In regard to the fecundity of the mulatto we have varied opin- 
ions. Morris (The Aryan Race, p. 216) tells us that he ‘“‘has the 
weakness and infertility of the hybrid.” Nott finds that in 
South Carolina the mulattoes show a decided infertility, although 
in Louisiana they are fairly prolific. Woodruff (Expansion of 
Races, p. 251) states quite positively that “The Mulatto in- 
variably dies out unless new black blood is infused into the 
mixed race, and though some families survive a few generations, 
as a rule there is absolute extinction of such feeble offspring.’’” 
1“ The Negro as a Soldier.” Anthrop. Rev. 7, 1869. 
2 As Prof. Kelsey has remarked (The Physical Basis of Society, p. 298), ‘Whenever 
we are told that a people of mixed white and Negro blood must perish from the 
earth let us not forget that across Africa in the Sudan and down the East Coast 
there are untold millions of people of just that descent.” 
