282 SCIEXCE PROGRESS. 



to reject the above-mentioned conclusion is very significant, 

 and I give it in his own words (p. 532) : — 



" 2. The supposition is contrary to a general law of the 

 animal economy, according to which, acquired varieties are 

 not transmitted from parents to their offspring, but terminate 

 in the generation in which they have taken their rise." 



The succeeding two sections are allotted to the con- 

 siderations contained in paragraphs i and 2. 



Section ii. (p. 532) is headed " Instances Showing the 

 Permanency of Complexion in Different Races ". The cases 

 in which races have completely changed in colour after 

 removal to a different climate he explains by a mixture of 

 breed ; and points out that " it is easy to find examples of 

 an opposite tendency, and to show that the original hue 

 has been preserved . , . ." Thus he brings forward the 

 instances of the descendants of English colonists in the 

 West Indies and Spanish in South America who "remain 

 as fair as their European ancestors," when there has been 

 no intermarriage with other races. " That this assertion 

 is correct, I am convinced," he says, "by the results of re- 

 peated inquiries." In the East the same results are found, 

 although the migration of white races into hot climates took 

 place at far earlier dates. Thus amongst other examples 

 he mentions that of the "white or Jerusalem Jews" who 

 are believed to have migrated to the Malabar coast in the 

 year 490 a.u., and whose living descendants are "said to 

 resemble the European Jews in features and in com- 

 plexion ". 



The converse "experiment of transplanting black races 

 into northern climates " has not been carried on for so long 

 a period, but Dr. Prichard points out that "several genera- 

 tions have produced little or no alteration in the complexion 

 of Negroes in the United States and in other temperate 

 climates". It is indeed stated that "the domestic Negroes 

 who are protected from the heat of the sun by more clothing, 

 and who pass their time in sheltered houses, are of a darker 

 complexion than the slaves who labour half naked in the 

 fields ". 



Section iii. This most significant and remarkable part 



