ACCLIMATIZATION. 671 



On the other hand, a cross between races is too often apt to 

 be a weakling, sharing in the pathological predispositions of each 

 of its parent stocks, while enjoying but imperfectly their several 

 immunities, as we have seen. 



Mulattoes in any climate are liable to lack vitality, and espe- 

 cially, unless a continual supply of white blood is kept up, they 

 tend to degenerate.* Dr. Gould notices this lack of vitality 

 among mulattoes as very marked in the Union army, f For this 

 reason intermixture is by many regarded as a doubtful remedy. X 

 Neither the Malay nor the Japanese mixed races have the vitality 

 of the Chinese.* Jousset affirms that in many cases crossing in- 

 creases the liability to attacks of fever. || In Guiana the negroes 

 thrive, but the mulattoes suffer from the climate.'^ Berenger- 

 Ferand states that the mulatto in Senegal so far degenerates as 

 to become infertile after three generations ; ^ and Westermarck, 

 while acknowledging that many statements of this kind are exag- 

 gerated, inclines to the view that crossing may be unfavorable to 

 fertility. % Be this as it may, it is certain that mulattoes are 

 pathologically intermediate between the white and the negro ; 

 they rarely have yellow fever, and are less liable to malaria 

 (paludism) than the Europeans ; and they are not predisposed to 

 bilious disorders. But they have all the diseases to which the 

 negro is alone liable namely, elephantiasis leprosy, phthisis, and 

 even the dreaded sleeping sickness {mat de sommeil).^ Finally, 

 it may be added that many of the most successful examples of 

 acclimatization have occurred where there has been a complete 



* Dr. S. B. Hunt showed by measurements during the civil war that the brain weight 

 of the mulatto, with less than half white blood, is below that of the pure negro (Quarterly 

 Journal of Psychological Medicine, New York, 186*7). 



f Military and Anthropological Statistics of American Soldiers, 1869, p. 319. 



:]: Dr. Ricoux, in Annales de Demographic, vi, p. 5, says it can never be a permanent 

 remedy in Algeria. Vide also Revue d'Anthropologie, second series, v, pp. 54, 79. Ibid., 

 pp. 85 et seq., contains full details on the relation of the sexes in South America. 



Walther (Revue d'Anthropologie, new series, i, p. 76) gives, for example, the following 

 rates of mortality from cholera in Guadaloupe in 1865 : Chinese, 2-7 per cent ; negro, 3-44 ; 

 Hindu, 3-87 ; European, 4-31 ; mulatto, 6-32. The particularly high vitality of the Chinese 

 is as marked as the weakness of the half-breed ; Dr. Brinton (Races and Peoples, p. 284) 

 corroborates this fully. 



* Revue d'Anthropologie, new series, iv, p. 236. Vide also remarks on racial pathology 

 infra. 



II Op. cit., p. 150. Its effects are discussed on pp. 154 et seq, 



^ Revue d'Anthropologie, ibid. 



^ Parturition is held by Pruner Bey to be peculiarly difficult among hybrids (Etudes sur 

 le Bassin, p. 13, Paris, 1855). Vide also Revue d'Anthropologie, second series, ii, p. 577, 

 and Posche, Die Arier, p. 10. ' 



:J History of Human Marriage, pp. 284, 287. 



^ Bordier, Colonisation Scientifique, p. 285, and Berenger-Ferand, op. cit. ; also Revue 

 d'Anthropologie, new series, v, p. 30. 



